Automatic Transmission
Which of the following is the name used for the larger end of the spool valve?
Lands
Where does the oil supplying the governor valve, throttle valve and other transmission pressure regulating valves come from?
The front pump at line pressure
When adjusting the fluid level in an automatic transmission with a dipstick, how much fluid is typically required to raise the level from the bottom of the crosshatched area or add mark to the full mark?
1 pint
How many of each, friction plates and steel plates, are commonly used in a multi-disc clutch?
3 to 5 friction and steel plates
Which of these converts the hydraulic pressure acting on a piston to a mechanical force that is then applied to a brake band?
Servos
A clutch and band application chart helps to:
identify a problem before you pull the transmission.
Which of these is often used in conjunction with check balls and spool valves to restrict fluid flow for timing purposes?
orifice
Which of the following is the formula to calculate the area of a circle?
∏r2
On computerized transmissions, which of the following is used to regulate line pressure?
An electronic pressure control solenoid
Technician A says that a damaged flex plate can cause knocking noises and damage to the front pump of the transmission. Technician B says that all of the engine power pulses and torque are transmitted through the bolts or studs holding the automatic transmission's torque converter to the flex plate. Who is correct?
Both A and B
Technician A says that valve body repairs can be done with the transmission installed in the vehicle. Technician B says that some brake servo adjustments can be done without removing the transmission from the vehicle. Who is correct?
Both A and B
Technician A says that you should check fluid level in many automatic transmissions with the engine idling and the transmission in park. Technician B says that modern automatic transmissions may not have a dipstick to check the level.
Both A and B
Technician A says transaxles include a differential and final drive gear to an automatic transmission. Technician B says dual-clutch transmissions use two clutches instead of a standard torque converter. Who is correct?
Both A and B
When reinstalling _________ in an automatic transmission, apply a small amount of transmission assembly lube to hold them in place.
Both A and B
Which of the following is the goal of in-vehicle diagnosis?
Both A and B (diagnose whether the fault is inside or outside of the transmission, diagnose the faulty components before removing the transmission and tearing it down)
If this automatic transmission component is not adjusted properly, the vehicle may not start, or it may start in gear, resulting in a major safety hazard.
Both A and B (shift linkage, transmission range sensor)
Which style of automatic transmission filter is used inside the transmission case?
Both A and C
When rebuilding an automatic transaxle with a chain style of power transfer, the what needs to be checked for wear?
Both A and C (chain, sprockets)
Which of the following is a typical method of connecting a transmission throttle valve to the engine's throttle?
Both B and C
How do you get direct drive from a planetary gear set?
By holding two of the three components at the same time
How are the impeller, turbine, and stator separated?
By thrust bearings
The Powertrain Control Module (PCM) monitors the ________ and the input shaft speed sensor to determine the amount of torque converter slippage and control the lock-up of the Torque Converter Clutch (TCC).
Crankshaft Position (CKP) Sensor
Hypoid gears
Cut to change direction of power flow by 90 degrees
Which of the following are symptoms of a leaking vacuum modulator?
Delayed shifts and white smoke from the exhaust
Which of the following filter designs was developed to hold a greater volume of dirt and particles.
Depth filters
When the Powertrain Control Module (PCM) receives the brake switch input, what does the PCM do with the Torque Converter Clutch (TCC)?
Disengage
On a hydraulically controlled automatic transmission, the computer can react to increased engine load only before the transmission shifts.
False
Overdrive ratios typically are used to decrease fuel economy while travelling at highway speeds by slowing the engine speed.
False
A simple planetary gear set can create two reverse ratios. How many forward ratios can it create?
Four
In a hydraulically controlled transmission, how is vehicle speed measured?
Governor
Under light load, a vacuum modulator gets what type of signal from the engine?
High vacuum, low pressure
Because most automatic transmissions have multiple clutches, it is good practice to rebuild _____, so that parts do not get interchanged.
Only one at a time
Which of the following is operated by the driver of a vehicle to manually select or deselect overdrive?
Overdrive switch
Which of the following is the type of sensor used to measure transmission line pressure?
Pressure transducer
How many engagements should you feel when installing a torque converter?
3
What gear ratio is achieved with an 8 tooth input gear driving a 24 tooth output gear?
3:1
Two planetary gear sets with a common sun gear are called...
A Simpson gear set
Disconnect the _______ from the transmission when adjusting the linkage and/or range sensors.
Shift linkage
If there is a problem in obtaining park, it could be due to:
Shift solenoid
Which of the following describes how shift solenoids are controlled by the PCM?
Shift solenoids are simply turned on and off
Which of the following has multiple lands designed to block or allow line pressure to pass to a band or clutch in order to apply the gear?
Shift valve
When performing an automatic transmission fluid and filter change what should a technician look for in the bottom of the transmission pan that indicates potential transmission problems?
Sparkly metal flakes and dark residue
As governor pressure increases, it pushes on the shift valves towards their upshift position. What determines the sequence in which the shift valves move?
Spring tension
Which of the following gear designs tend to be much louder and do not offer as much strength as the other types of gears.
Spur
Which of the following describes the output pattern of a reed switch?
Square wave
Which of the following is typically used to check the automatic transmission pump housing for wear?
Straightedge with feeler gauge
Tech A says that multi-plate clutches must have a specified amount of clearance when they are installed. Tech B says that there should be no clearance when they are installed because the clutch would slip. Who is correct?
Tech
Tech A says that a mechanical pressure regulator exhausts excess fluid back to the transmission pan. Tech B says that if the transmission pan is removed, the magnet must be replaced. Who is correct?
Tech A
Tech A says that line pressure is reduced during light throttle conditions to improve fuel economy. Tech B says that as the engine speeds up in rpm, the transmission line pressure gradually reduces to maintain clutch pack pressure. Who is correct?
Tech A
Tech A says that multidisc clutches are used to drive or hold planetary gear components. Tech B says that bands are used to drive planetary gear components. Who is correct?
Tech A
Tech A says that one crescent-type front pump measurement uses a feeler blade between the outer gear and pump body. Tech B says that a micrometer is used to measure the width of the crescent. Who is correct?
Tech A
Tech A says that the EPC solenoid controls line pressure. Tech B says that if an EPC fails, it will default to minimum line pressure. Who is correct?
Tech A
Tech A says that the torque converter hub drives the front pump in an automatic transmission. Tech B says that the turbine shaft drives the front pump. Who is correct?
Tech A
Tech A says that using a scan tool to momentarily activate the TCC, with the engine idling in drive and the brakes applied, is a typical troubleshooting task. Tech B says that diagnosis is a waste of time on a faulty transmission because it will be rebuilt anyway. Who is correct?
Tech A
A vehicle comes in only operating in 3rd gear. Tech A says the transmission will need to be replaced. Tech B says that the transmission may be operating in limp-in mode. Who is correct?
Tech B
Tech A says that accumulators are used to filter contaminates. Tech B says that accumulators are used to soften clutch engagement. Who is correct?
Tech B
Tech A says that after rebuilding a clutch, it needs to be air checked before the clutch plates are installed. Tech B says that clutches that are rebuilt outside of the transmission are typically air tested before installing them back in the transmission. Who is correct?
Tech B
Tech A says that bands allow components to freewheel in one direction, and lock up in the other direction. Tech B says that some servos are the "pressure release" type. Who is correct?
Tech B
Tech A says that governor pressure is controlled by torque converter rpm. Tech B says that governor pressure is controlled by output shaft speed. Who is correct?
Tech B
Tech A says that increasing the transmission fluid level from the add mark to the full mark typically requires a quart of fluid, just like with engine oil. Tech B says that when checking for automatic transmission fluid leaks, you should also remove the radiator cap and look for ATF in the radiator, Who is correct?
Tech B
Tech A says that line pressure in an automatic transmission is controlled by engine rpm. Tech B says that modulator pressure changes with engine vacuum. Who is correct?
Tech B
Tech A says that reed switches produce an AC signal. Tech B says that a magnetic VSS can be diagnosed by observing the pattern on a lab scope and comparing it to a known good pattern. Who is correct?
Tech B
Tech A says that the front pump only operates when the turbine is rotating. Tech B says that a torque converter clutch locks the turbine to the converter housing when applied. Who is correct?
Tech B
Tech A says that the torque converter should be bolted to the flexplate before installing the transmission. Tech B says that when installing the torque converter, three separate engagements with their mating parts must be felt. Who is correct?
Tech B
Technician A says powertrain mounts hold the engine and transmission in proper position in the vehicle. Technician B says a faulty powertrain mount cannot affect throttle linkage. Who is correct?
Technician A
Technician A says the manual lever position (MLP) switch is sometimes called a transmission range switch or a neutral safety switch. Technician B says a MLP switch monitors transmission fluid levels. Who is correct?
Technician A
Technician A says the Powertrain Control Module (PCM) can reduce transmission wear by increasing torque during gear shifting. Technician B says the PCM monitors input shaft and output shaft speed as a method of fault detection. Who is correct?
Technician B
What part can directly drive the front pump of an automatic transmission?
Torque converter
Which of the following is used to turn the front pump on an automatic transmission?
Torque converter hub
When the Powertrain Control Module compares the Crankshaft Position Sensor (CKP) sensor signal to the Input Shaft Speed (ISS) sensor in the transmission, what does the difference between these two sensors indicate?
Torque converter slippage
Blocked transmission coolers can starve which of the following transmission circuits?
Transmission lubrication circuit
The pressure regulator valve keeps the pressure at a regulated level by exhausting excess pressure back to the ________.
Transmission pan
When the driver starts the vehicle, the front pump draws fluid up from the _______, through the filter, and into the pump.
Transmission pan
Always follow the vehicle manufacturer's recommended transmission disassembly and service procedures to prevent injury.
True
An automatic transmission's torque converter that is not properly installed will cause catastrophic damage to the front pump when the vehicle is first started.
True
Bidirectional control means the technician will be able to command different solenoids and actuators with a vehicle scan tool to check their operation.
True
Both multi-disc clutches and bands are hydraulically operated.
True
Helical gear teeth are cut on a spiral around the axis of the shaft.
True
If the transmission's torque converter bolts will be reused, the technician should check the threads carefully for damage and wear.
True
In a computer controlled transmission, the Powertrain Control Module (PCM) controls the Torque Converter Clutch (TCC) solenoid.
True
Learning the function and purposes of each of the hydraulic components in an automotive transmission will help you to diagnose transmission-related problems.
True
Limp-in mode means that even if the computer for the transmission or the part of the PCM that controls the transmission fails, the vehicle will still be drivable.
True
Line pressure is boosted by throttle pressure to increase holding force of clutches and brakes to prevent slipping.
True
Many common automatic transmissions have repair kits for the valve body assemblies that involve reboring the valve body bore and installing a sleeve or larger valve.
True
Multi-disc clutches are unique in that they not only can be used to hold a member of the planetary gear set, but they are also the only apply device that can be used to drive a member of the planetary gear set.
True
Pascal's law is one of the fundamental physics principles behind the operation of an automatic transmission.
True
Rollers or races that show any signs of damage must be replaced, and the lubrication circuit for the one-way roller should be carefully inspected for blockage.
True
Some vehicles have a mode selection switch on, or near, the gear shift lever to change the:
Vehicle shift characteristics
Choose the correct statement.
When rebuilding an automatic transmission, all multidisc clutch assemblies should be rebuilt.
Which of the following can be used to remove light scratches and groves from automatic transmission pump housing?
Whet stone
When does the kickdown valve force downshifts?
Wide open throttle
When rebuilding a clutch pack, the piston needs to be carefully inspected for:
cracks
Accumulators are used to:
dampen the application of clutches and bands.
Depth filters may be made of:
felt
The device that varies incoming line pressure using centrifugal force is known as:
governor.
All of the below can be used to lubricate seals except:
grease
Which gear needs higher line pressure, and the modulator/throttle valve pressure are not used?
reverse.
What is the operating condition where the turbine is stationary and the engine throttle is wide open, making the rotational speed of the impeller as high as possible?
stall speed
Spur gears
straight cut gears
All of the following can be replaced during in-vehicle transmission repairs EXCEPT:
sun gear
Which of the following can cause discoloration of a band drum?
Band slippage
Technician A says that an orifice is a restriction. Technician B says that orifices are used to slow down clutch engagement. Who is correct?
Both A and B
Two technicians are discussing torque converters. Technician A says that a torque converter does a similar job as the manual clutch. Technician B says that the torque converter multiplies torque from the engine to the input shaft of the transmission. Who is correct?
Both A and B
Technician A says that if there is excessive up and down play in the driveshaft, the extension housing bushing should be replaced. Technician B says that on many transmissions the extension housing has to be removed to replace the bushing, but on some older transmissions special pullers and installers could make this an in-vehicle repair. Who is correct?
Both A and B
Which of the following is a good first step in diagnosis of any transmission concern?
Fluid level and condition check
Which of the following describes the hydraulic pressure produce by the modulator valve at low engine vacuum?
High modulator pressure
In a variable displacement vane pump, what part below changes pump output based on the oil pressure acting on it?
Moveable housing of the pump
Technician A says the engine load sensor is used to determine when the Torque Converter Clutch (TCC should be applied and released). Technician B says Manifold Absolute Pressure (MAP) sensors may be used to test certain emissions related components for proper function. Who is correct?
Both A and B
Technician A says typically on hydraulic controlled transmissions, downshifting was often accomplished through the use of a kickdown valve. Technician B says in some transmissions, the kickdown valve was called a detent valve. Who is correct?
Both A and B
Technician A states that when diagnosing an automatic transmission problem, it is important to first verify the customer complaint by taking the vehicle on a road test, if possible. Technician B states that after one has verified the customer complaint, one should pay attention and document when the problem occurs. Who is correct?
Both A and B
Technician A says that fifth gear provides more torque to the wheels than second gear. Technician B says that fourth gear provides more wheel speed than first gear. Who is correct?
Technician B
What type of variable resistor are Transmission Fluid Temperature Sensors?
Thermistor
The flex plate bolts to the rear crankshaft flange in the same manner as a flywheel would.
True
The line pressure sensor in an automatic transmission is supplied with reference voltage from the PCM.
True
The manual lever position (MLP) is often mounted directly on the automatic transmission case where the shift linkage connects to the transmission.
True
The service information for most transmissions gives a range for clutch pack clearance.
True
Transmission line pressure is varied based on engine load and the selection of certain gears to maintain the ideal application force of the clutches and bands.
True
Two-way check valves commonly use a check ball design.
True
When a servo pushes on the corresponding linkage, a band is squeezed tightly around a drum, stopping the drum from spinning and holding whichever planetary gear component the drum is attached to.
True
Without the ability to automatically connect and disconnect the transmission from the engine, a vehicle would stall when it came to a stop, much like a manual transmission vehicle will do if the driver forgets to depress the clutch pedal.
True
You should never test-drive a vehicle with a scan tool in front of an airbag in case of an airbag deployment.
True
Before we can calculate the amount of force created by a piston, we must calculate the ______ of the piston.
area
All of the following are advantages of using the clutch and band application charts EXCEPT:
determining that the transmission does not need repair.
All of the following can be replaced during in-vehicle transmission repairs except:
sun gear
Which of the following is a typical gear ratio for first gear?
3:1
During automatic transmission testing on a hoist, what is the maximum speed the vehicle should be operated?
45 mph
Which of the following sensors is used on a drive-by-wire vehicle to determine the driver's intent as related to acceleration/deceleration?
Accelerator Pedal Position Sensor (APPS)
All of the following statements are true except:
As the throttle opening increases, throttle valve pressure decreases.
How do you get reverse with planetary gears?
Attach the ring gear to the output shaft, and hold the planet carrier
When the engine accelerates, higher impeller speed discharges the fluid across and against the turbine vanes. What happens when the oil strikes the turbine vanes?
Both A an B
Two technicians are discussing transmission end play. Tech A says that if the end play is insufficient, it may cause premature wear on the thrust bearings. Tech B says that transmissions with incorrect end play may have been reassembled incorrectly. Who is correct?
Both A and B
Having access to what would allow the technician to test drive the vehicle in the repair shop?
Chassis dynamometer
The Powertrain Control Module (PCM) monitors the ________ and the input shaft speed sensor to determine the amount of torque converter slippage and control the lock-up of the Torque Converter Clutch (TCC). Camshaft Position (CMP) Sensor
Crankshaft Position (CKP) sensor
Helical gears
Cut in a spiral around the axis of the shaft
When using a scan tool to monitor electronic components inside and outside of the transmission during a road test, which of the following precautions has to be taken?
Do not drive with a scan tool in front of an airbag.
Which of these transmissions uses two, either wet or dry, clutches in place of a standard torque converter to connect the engine to the transmission?
Dual-clutch transmissions
Hydraulic power train mounts use silicone hydraulic fluid that is squeezed back and forth between three chambers, similar to the design of a shock absorber.
False
Most modern vehicles cannot identify and adapt to a driver's individual style and to environmental conditions.
False
Which type of gears are often used in the final drive of front-wheel-drive transaxles and also in conventional final drives on rear-wheel-drive vehicles?
Hypoid gears
All of the following statements are true with respect to the bolts and nuts securing the torque converter to the flexplate except:
If any bolts are found to be damaged, replace only the damaged bolts.
All the following statements are true except:
In a fully hydraulically controlled transmission, the shift points are controlled by vehicle's power train control module (PCM).
All of the following statements are true except:
Increasing the amount of torque being transmitted to the transmission reduces transmission wear.
Most electronically controlled transmissions have a fail-safe or _______ mode.
Limp-in
Tech A says that clutch pack clearance should be checked with a micrometer. Tech B says that any clearance in the clutch pack means that the clutch discs are worn out. Who is correct?
Neither A nor B
Tech A says that commanding shift solenoids on and off, one at a time, is an example of focused testing. Tech B says that test driving the vehicle is an example of verifying the customer's concern. Who is correct?
Both A and B
Tech A says that delayed shifts could be caused by a malfunctioning TPS. Tech B says that the crankshaft position sensor is used to indicate engine speed. Who is correct?
Both A and B
Tech A says that electronically controlled automatic transmissions can vary their gear ratios based upon winter weather conditions. Tech B says that on a vehicle with traction control, the transmission will change shift programming to assist when slippery conditions are encountered. Who is correct?
Both A and B
Tech A says that modifying governor weights will alter transmission shifting. Tech B says that excessive modification of the governor weights may cause the transmission to not shift. Who is correct?
Both A and B
Tech A says that the higher the numerical gear ratio (4:1), the more torque will be applied to the wheels. Tech B says that the lower the numerical gear ratio (2:1), the more speed can be obtained at the wheels. Who is correct?
Both A and B
What should be used to check the thickness of a thrust washer, and the thickness should be compared to the vehicle manufacturer's specifications.
A micrometer
Which of the following is a method of operating a kickdown?
All of the above (linkage, electric solenoid, cable)
Technician A says that low line pressure can be caused by a plugged transmission vent. Technician B says that high line pressure is caused by a restricted filter. Who is correct?
Neither A or B
Technician A says that spur gears create more thrust motion than helical gears. Technician B says that helical cut gears are noisier than straight-cut gears. Who is correct?
Neither A or B
Which sensor do some manufacturers compare to the input shaft speed sensor to measure the amount of time required to complete the shift from one gear to another?
Output shaft speed sensor
Which pump design produces the same amount of flow with each pump shaft rotation?
Positive displacement
Which of the following additives prevent the internal parts of the transmission from developing rust and corrosion on metal components?
Rust and corrosion inhibitors
What tools are commonly used when performing an in-vehicle diagnosis of an automatic transmission?
Scan tool and pressure gauges
What type of gear set has two simple planetary gear sets that share a common sun gear?
Simpson
Tech A says that transmission failures can be caused by failed lip seals preventing full pressure from being applied to the clutches. Tech B says that orifices are designed to speed up the movement of a valve. Who is correct?
Tech A
Tech A says that one benefit of using hydraulic pressure is that it is not affected by leaks in the system. Tech B says that hydraulic pressure is the same in all directions within a closed container. Who is correct?
Tech B
Tech A says that park is obtained by mechanically locking one band and one clutch together. Tech B says that spool valves tend to be self-cleaning. Who is correct?
Tech B
Tech A says that powertrain mounts hold the powertrain firmly in place and prevent the engine from moving at all. Tech B says that the life of rubber powertrain mounts is reduced by being saturated with oil from a leak. Who is correct?
Tech B
Tech A says that reciprocating force controls governor pressure. Tech B says that centrifugal force controls governor pressure. Who is correct?
Tech B
Tech A says that to determine whether roller type thrust bearings need to be replaced, they should be measured with a micrometer. Tech B says that to determine whether thrust washers are worn excessively, they should be measured with a micrometer and compared to specifications. Who is correct?
Tech B
Tech A says that when checking line pressure, the engine should be off. Tech B says that low line pressure can be caused by a worn pump. Who is correct?
Tech B
Tech A says that when checking the fluid level on the dipstick, always read the highest level on either side. Tech B says that when reinstalling the pan, start all of the bolts before tightening any of them. Who is correct?
Tech B
Technician A says a pulse-width modulation value of 50% means the valve is open 50% of the time and closed 50% of the time. Technician B says a pulse-width modulation of 255 means that line pressure is increased by 25%. Who is correct?
Technician A
A vehicle stalls when coming to a stop. After test-driving the vehicle, it is found that the Torque Converter Clutch (TCC) is remaining engaged as the vehicle slows down. Technician A says that the vehicle probably needs a new torque converter. Technician B says that the TCC solenoid may be sticking and could need replaced. Who is correct?
Technician B
Technician A says that automatic transmissions will change gear ratios based upon winter weather conditions. Technician B says that on a vehicle with traction control, the transmission will change shift programming to reduce wheel spin. Who is correct?
Technician B
Technician A says that reciprocating force controls governor pressure. Technician B says that centrifugal force controls governor pressure. Who is correct?
Technician B
What will happen if the pushrod for a servo is too long?
The brake will drag when the servo is released
When the clutch pack has excessive clearance, what can happen?
The clutch may slip when applied
What must you ensure before air checking an automatic transmission clutch assembly?
The clutch pack assembled and the snap ring is fully engaged
When did torque converter clutches first start appearing?
The early 1980s
Which of the following is a common name for the primary automatic transmission oil pump?
The front pump
The vehicle has no reverse but moves forward. The transmission seems to drive forward fine. The transmission holds on deceleration in first. Which of these could cause the problem?
The reverse input clutch.
A line pressure sensor is a transducer that varies resistance with the pressure applied to the sensor element.
True
After installing leak detection dye in an automatic transmission and running the transmission for a few minutes, any leaking dye should be visible with a black light.
True
If a transmission only had a governor valve, it would shift at the same speeds regardless of engine load.
True
If the automatic transmission's planetary gear set clearance is not correct, the planetary set will need to be disassembled, if it is a serviceable type, and thrust bearings of a different thickness will need to be installed.
True
The automotive technician should not perform a stall test if there is an engine problem, such as worn engine bearings, broken power train mounts, or an engine overheating condition.
True
The band is a friction-lined steel belt that wraps around the outside of a drum inside the automatic transmission.
True
The gears inside a conventional automatic transmission are constantly meshed to each other.
True
To properly diagnose a problem with an automatic transmission, you need to do a thorough inspection of the transmission and perform several diagnostic tests.
True
True or False. The vanes in a vane pump must be reinstalled in the same direction that they were removed to prevent rapid wear.
True
When the driver shifts the transmission into park, a lever, called a parking pawl, is forced into notches cut into a hardened steel drum on the output shaft of the transmission.
True
How many shift solenoids are normally used in many four-speed automatic transmissions?
Two
Discoloration of the planetary gears or the planet carrier is most likely a sign of:
a failed lubrication circuit
All of the following are very critical while doing a test drive except:
avoiding testing the transmission in different gear ranges.
A drum that is not badly scored (lightly worn) should:
be refinished using emery cloth.
As part of general transmission maintenance, all of the following should be done except:
disassembling and checking the transmission.
When the manual valve is in the park position, line pressure:
does not flow to any other component
The output shaft bushing is subject to higher amounts of wear from the spinning of the drive shaft. What other drive shaft action tends to wear this bearing?
in and out
Any gear ratio of less than 1:1 is considered an overdrive ratio. Overdrive ratios are typically used to:
increase fuel economy
If thrust bearings or washers are worn, ______ movement of components inside the automatic transmission will be allowed, affecting their operation.
lateral
When there is a large difference between the speed of the impeller and the turbine:
maximum torque multiplication occurs.
The vacuum modulator converts the engine vacuum signal into:
modulator pressure.
In second gear with low governor pressure, the line pressure is allowed to flow from the 2-3 shift valve to:
the 2nd gear clutch or band.
When the governor pressure becomes great enough to overcome the spring pressure and the modulator/throttle valve pressure in the 2-3 shift valve, line pressure is allowed to flow to:
the 3rd gear clutch or band.
Tech A says that low line pressure can be caused by a plugged transmission vent. Tech B says that high line pressure is caused by a restricted filter. Who is correct?
Neither A or B
Tech A says that spur gears create more thrust motion than helical gears. Tech B says that helical cut gears are noisier than straight-cut gears. Who is correct?
Neither A or B
Tech A says that the converter and cooler operate at line pressure. Tech B says that line pressure causes the manual valve to move during upshifts and downshifts. Who is correct?
Neither A or B
Tech A says that the impeller is splined to the input shaft. Tech B says that the stator is fixed solidly to the torque converter housing. Who is correct?
Neither A or B
Technician A says that in reverse, governor pressure regulates line pressure. Technician B says that in reverse, modulator pressure regulates line pressure. Who is correct?
Neither A or B
Which of the following is not a holding device used in an automatic transmission?
clutch band brakes
If a pressure of 100 psi (689 kPis applied to a piston with a surface area of 3 square inches, what would be the resulting force?
300 lbs
After the transmission is installed properly into the vehicle, approximately what percentage of the total transmission fluid should be added to the transmission?
75%
Two planetary gear sets with a common ring gear and two sun gears are called
A ravigneaux gear set
Which of the following are used to dampen the application of clutches and bands by increasing the circuit volume during the shift?
Accumulators
The technician should add fluid to the transmission until it reaches which point dipstick when performing the final checks to an automatic transmission.
Add mark or safe mark
The Powertrain Control Module (PCM) and Transmission Control Module (TCM) have memory that contains the software for the computer. Which of the following is also retained in memory in these modules?
All of the above (DTCs, freeze-frame data, learned data)
What problems may occur if you fail to torque parts correctly when reassembling an automatic transmission?
All of the above (a premature failure of the transmission, a second visit from an unhappy customer, damage to the threaded holes or case warping)
When the automatic transmission is removed from the vehicle, which of the following needs to be checked on the flex plate?
All of the above (crankshaft bolt holes for elongation and mounting area cracking, torque converter bolt holes for elongation and mounting area cracking, ring gear teeth for damage and flex plate body for cracking)
Which of the following parts make up a simple servo?
All of the above (cylinder containing a piston and seal, pushrod, piston return spring)
Which of the following is a typical high-performance modification made to the transmissions governor?
All of the above (drilling holes in the governor's weights, removing the governor completely, placing weaker springs in the governor)
Which of the following is heavily loaded during a stall test?
All of the above (engine, transmission, brake system)
During a stall test, the engine rpm is higher than expected in all gears. Which of the following could be the cause?
All of the above (faulty pump, internal pressure leak, clogged filter)
Which of the following pressures is not used in reverse, because there is only one speed available?
All of the above (governor pressure, modulator pressure, throttle valve pressure)
How can spool valves of an automatic transmission be moved or positioned?
All of the above (manually, by spring pressure, by hydraulic pressure)
Which of the following is part of inspecting a gear and crescent type front pump?
All of the above (measuring the outer gear (rotor) to housing clearance, measuring the clearance between the inner gear and crescent, measuring the housing for wear)
The Powertrain Control Module (PCM) performs basic circuit checks as part of the electronically controlled transmissions self-diagnostic routine. Which of the following would qualify as a basic check?
All of the above (open sensor circuit check, grounded sensor circuit check, out of range value check)
Which of the following should you inspect each bushing inside an automatic transmission for?
All of the above (scratches, scoring, large pits)
Which of the following is a component of a planetary gear set?
All of the above (sun gear, planetary gear, ring gear)
Where should compressed air should be used to ensure each fluid passage is clear and unobstructed?
All of the above (transmission case, valve body, input and output shafts)
Failed powertrain mounts may cause a loud thumping noise. Which of the following operating conditions might this noise due to bad mounts be most prominent?
All of the above (when applying the accelerator in drive, when applying the accelerator in reverse, when coasting and braking)
Tech A says that electronically controlled automatic transmissions improve fuel economy over hydraulically controlled transmissions. Tech B says that electronically controlled transmissions also reduce emissions. Who is correct?
Both A and B
Tech A says that most automatic transmissions use planetary gear sets. Tech B says that planetary gear sets are often combined together to create the needed gear ratios for a transmission. Who is correct?
Both A and B
Tech A says that one type of front pump is a variable displacement pump. Tech B says that the front pump is turned by the torque converter hub. Who is correct?
Both A and B
Tech A says that performing a stall test can reveal slippage within the torque converter or transmission. Tech B says that a stall test can damage some transmissions and should not be performed on all transmissions. Who is correct?
Both A and B
Tech A says that pressure switches are used in electronically controlled transmissions to indicate which gear the transmission is operating in. Tech B says that the brake on/off switch signals the PCM to disengage the TCC. Who is correct?
Both A and B
Tech A says that spring tension against a spool valve regulates system pressure. Tech B says that a 50% pulse width modulation means the valve is closed 50% of the time. Who is correct?
Both A and B
Tech A says that the fluid level in many automatic transmissions is checked with the engine idling and the transmission in park. Tech B says that some manufacturers don't provide a dipstick to check the automatic transmission fluid (ATF) level. Who is correct?
Both A and B
Tech A says that the throttle valve is controlled by a cable or linkage hooked to the engine throttle linkage. Tech B says that a misadjusted throttle valve cable can prevent wide-open throttle (WOT) on an engine. Who is correct?
Both A and B
Tech A says that the torque converter can multiply the amount of torque transmitted from the engine to the transmission. Tech B says that the torque converter allows the engine to idle when the vehicle stops in traffic. Who is correct?
Both A and B
Tech A says that transmissions with an input shaft speed sensor and a vehicle speed sensor (VSS) can use this information to determine shift solenoid failure. Tech B says the input shaft speed sensor is also called a turbine speed sensor. Who is correct?
Both A and B
Tech A says that when assembling a transmission, the components should be lubricated with the correct automatic transmission fluid or transmission assembly lube. Tech B says that the transmission end play needs to be measured after the front pump is installed. Who is correct?
Both A and B
Tech A says that when inspecting the torque converter, you need to check the snout of the converter where the seal and bushing rides for excessive wear. Tech B says that the internal end play of the converter must be checked. Who is correct?
Both A and B
Technician A says an improperly adjusted shift linkage and range sensor can cause the vehicle to start in gear. Technician B says an improperly adjusted shift linkage and range sensor can cause the vehicle to not start. Who is correct?
Both A and B
Technician A says check valves are classified as one-way and two-way in automatic transmissions. Technician B says two-way check valves are often used in the release circuit for application devices. Who is correct?
Both A and B
Technician A says that electronically controlled automatic transmissions can vary their gear ratios based upon winter weather conditions. Technician B says that on a vehicle with traction control, the transmission will change shift programming to assist when slippery conditions are encountered. Who is correct?
Both A and B
Technician A says that the throttle valve is controlled by a cable or linkage hooked to the engine throttle linkage. Technician B says that a misadjusted throttle valve cable can prevent wide open throttle (WOT) on an engine. Who is correct?
Both A and B
Technician A says the Powertrain Control Module (PCM) manages engine torque by retarding engine ignition timing prior to transmission shifts. Technician B says limp-in mode refers to the vehicle still functioning in the event of a failure of the transmission computer or part of the PCM that controls the transmission. Who is correct?
Both A and B
Two technicians are discussing electronically controlled automatic transmissions. Technician A says an air test can check clutches and bands for holding pressure and proper movement. Technician B says an air test can identify a leak in a hydraulic circuit or unusual application of a band or clutch. Who is correct?
Both A and B
What factors are used to control line pressure so that appropriate force is used to apply and hold the clutches and bands?
Both A and B
Which of the following statements is True about the location of Mass Air Flow (MAF) sensors?
Both A and B
To which of the following should a technician compare transmission operation during a test drive in order to help isolate the transmission concern?
Clutch application chart
Which of the following is installed in an engine coolant passage, often near the thermostat housing on an engine?
ECT sensor
Which of these is used to regulate line pressure on computerized transmissions?
EPC solenoid
Which position should the manual valve be in to check the fluid level?
Either A or B (park, neutral)
Which of the following works just like a Transmission Fluid Temperature (TFT) sensor?
Engine Coolant Temperature (ECT) sensor
Data from the input shaft speed sensor and output shaft speed sensor are compared by the transmission control module (TCM) or powertrain control module (PCM) to determine all of the following, EXCEPT:
Engine misfires
Where is the Throttle Position Sensor (TPS) mounted?
Engine throttle body assembly
Output shaft end play and side gear backlash must be checked on an automatic transaxle. What are the possible problems if backlash is incorrect?
Excessive noise and seizing of the gears
An automatic transmission fluid leak can result in the failure of the transmission due to a high fluid level.
False
Periodic maintenance always includes transmission fluid and filter replacement, which allows for the inspection of debris or contaminants in the bottom of the transmission pan.
False
Scanning for computer codes and data will allow you to pinpoint the root cause of the transmission issue without further troubleshooting.
False
Shift solenoids are duty cycled to cushion the shift in an electronically controlled transmission.
False
Some transmissions shift into overdrive and engage the torque converter clutch when the brake input is received by the Powertrain Control Module (PCM).
False
The aerosol can transmission cooler cleaning canister is usually good for three or four coolers before it needs replacing.
False
The clutch pack steels typically have splines, or teeth, on the inside edge to hold them to a member of the planetary gear set.
False
The higher the pulse width of a pressure control solenoid, the higher the transmission line pressure is.
False
When disassembling an automatic transmission, the best practice is to disassemble, clean and inspect every possible part at once so that you can make a complete parts list of required components.
False
If a transmission slips it is usually because of insufficient holding power of an apply device. When the transmission slips, the friction material on clutches and brakes will be destroyed very quickly. Which of the following is most likely to cause a transmission to slip in one gear?
Faulty clutch seal
Which of the following terms refers to the amount that a bearing is able to move before hitting the bearing race?
Free play
Slippery conditions require a _______ that enhances traction and the stability of motion of the vehicle.
Gear ratio
Line pressure that is sent to the _______ is allowed to be exhausted back to the transmission pan when the vehicle is not moving and the governor is not creating any pressure.
Governor
To check the pump operation, what test should the technician conduct?
Hydraulic pressure test
Which of the following tests evaluate the transmission pump operation, the pressure regulator function, and the seals and gaskets inside the transmission?
Hydraulic pressure test
All the following statements describing VSS are true except:
It is primarily used to determine functionality of emissions related components.
Choose the correct statement with respect to limp-in mode.
It is when the transmission can only operate in one forward gear.
All of the following statements are true with respect to vehicle speed sensor (VSS) except:
It replaces the vacuum modulator on a computerized transmission.
If an automatic transmission only had a governor, and no throttle valve or vacuum modulator, what is the shift most lilely to be like?
It would shift at the same point no matter what the engine load is.
Which of the following hydraulic pressures is used to apply clutches and bands?
Line pressure
Which of the following is a pressure transducer?
Line pressure sensor
Which of the following seal designs is typically used between the front pump and the rotating clutch drums?
Locking seals
Which of these is least likely to cause harsh shifting during normal cruising speeds?
Low line pressure
Which of the following sets transmission line pressure?
Main pressure regulator valve
Which of these valves is directly connected to the gearshift mechanism in the vehicle?
Manual Valve
Which of the following is used by the PCM to tell which gear range the driver has selected with the shift lever?
Manual lever position switch
Which of the following sensors is used to measure engine load?
Mass Airflow (MAF) sensor
Holding the ring gear and driving the sun gear creates what?
Maximum forward reduction (low gear)
Which of the following devices uses a spring and a spool valve to dump excess fluid back to the transmission pan?
Mechanical pressure regulator valve
Holding the sun gear and driving the ring gear creates what?
Minimum forward reduction (highest non-overdrive gear)
Distracted driving can lead to a vehicle accident, so which feature of a scan tool can record the information while you test-drive a vehicle?
Movie
Which of the following can be used to either hold or drive a member of the planetary gear set?
Multidisc clutches
Tech A says that bands are a type of hydraulic valve. Tech B says that servos are devices used to allow free movement in one direction and lock up in the other direction. Who is correct?
Neither A or B
Tech A says that in reverse, governor pressure regulates line pressure. Tech B says that in reverse, modulator pressure regulates line pressure. Who is correct?
Neither A or B
Which of the following seal designs are made from neoprene rubber and are often found sealing stationary parts of the transmission, such as a speedometer cable assembly or governor cover.
O-ring seals
________ can be either one-way rollers or sprag.
One-way clutches
Which of the following terms refers to the amount of force placed on a bearing before any vehicle load is on the bearing?
Preload
Each of the hydraulic components works with the others to direct fluid under the proper ________ to the appropriate places in the transmission.
Pressure
What type of gear set has two simple planetary gear sets that share a common ring gear?
Ravigneaux
When a customer describes a slipping transmission as a complaint, what test is the best way to verify?
Road test
Which of the following is not a method of checking engine and transmission mounts?
Rocking the steering wheel while driving about 100 MPH while looking for excessive movement.
Which of the following additives are designed to help protect the seals inside a transmission and cause the seals to swell slightly to help prevent leaks and clutch slippage?
Seal conditioners
Everything seems to be working fine but the vehicle is not going into neutral. Where could the problem be?
Shift Solenoid
Transaxles may have a second pan fitted somewhere other than the bottom of the transmission that encloses the valve body. What is that pan commonly called?
Side pan
Which of the following governor designs uses two valves: a primary valve and a secondary valve?
Staged governor
Which of the following governor designs is most precise across a wide range of road speeds?
Staged governors
Which test stresses the drivetrain so much that many manufacturers do not recommend performing it?
Stall test
Tech A says that a vacuum modulator converts manifold vacuum into an engine load signal. Tech B says that the manual valve is moved by governor pressure to force a shift. Who is correct?
Tech A
Tech A says that band and clutch application charts can help to diagnose faults in a transmission. Tech B says that 100 psi of pressure on a 2-square-inch piston results in 50 lb of force. Who is correct?
Tech A
Tech A says that the ECT sensor and the TFT sensor cause a delay in shifting when they indicate cold temperatures. Tech B says that the ECT and the TFT should read substantially different temperatures after sitting over night. Who is correct?
Tech A
Tech A says that when changing the fluid and filter, the presence of a small amount of clutch material in the pan is normal. Tech B says that if the pan gasket is leaking, you should tighten the pan bolts about a quarter turn at a time until the leak stops. Who is correct?
Tech A
Tech A says that when governor pressure on one side of a shift valve overcomes spring pressure and throttle pressure on the other side, an upshift occurs. Tech B says when reverse boost pressure on one side of the reverse valve overcomes governor pressure on the other side, shift into reverse occurs. Who is correct?
Tech A
Tech A says that when rebuilding a multidisc clutch, the steels should be checked for flatness, and their thickness should be measured. Tech B says that it is common to reuse the clutch piston's lip seals. Who is correct?
Tech A
A vehicle stalls when coming to a stop. After testing the transmission it is found that the TCC solenoid is sticking in the on position. Tech A says that the vehicle probably needs a new torque convertor. Tech B says that the TCC solenoid needs to be replaced. Who is correct?
Tech B
Tech A says that a one-way roller clutch will work fine if assembled in either direction. Tech B says that sprag clutches must be serviced as a complete unit if any damage is found. Who is correct?
Tech B
Technician A says a typical Manifold Absolute Pressure (MAP) sensor can be connected directly to the intake manifold or connected through a vacuum hose. Technician B says most modern MAP sensors do not use a flexible silicon chip within a chamber anymore. Who is correct?
Technician A
Technician A says on electronically controlled transmissions, the Torque Converter Clutch (TCC) solenoid is monitored by the Powertrain Control Module (PCM) and diagnostic trouble codes can be set when the TCC is not operating correctly. Technician B says on older hydraulically controlled transmissions, the PCM will set codes if the TCC solenoid is physically stuck closed. Who is correct?
Technician A
Technician A says that when governor pressure on one side of a shift valve overcomes spring pressure and throttle pressure on the other side, an upshift occurs. Technician B says when reverse boost pressure on one side of the reverse valve overcomes governor pressure on the other side, shift into reverse occurs. Who is correct?
Technician A
Inside a torque converter, the one-way clutch allows the stator to rotate only in one direction. Technician A says that it will turn in the same direction as the output shaft. Technician B says it turns in the same direction as the impeller. Who is correct?
Technician B
Technician A says that in most cases even if a job requires a full face shield, it is typically an accepted practice to wear just safety glasses. Technician B says you need to make sure the PPE you are using is worn correctly. . Who is correct?
Technician B
When the torque converter clutch is engaged, what are the springs which dampen engine and drive line vibrations called?
Torsional damper
An automatic transmission's governor is free to spin inside a precision bore that is lubricated with ______.
Transmission Fluid
Which of the following are two other names commonly used for the manual lever position (MLP) switch?
Transmission Range Switch or Neutral Safety Switch
Which of these should be used to identify fluid passages through the case when inspecting fluid delivery circuits?
Transmission case diagram
Which of the following is used to report the presence of hydraulic pressure in an apply circuit, such as the Torque Converter Clutch (TCC)?
Transmission pressure switch
A misplaced valve body bolt can cause catastrophic damage when the vehicle is started if the bolt protrudes into any of the rotating parts of the transmission from the valve body area.
True
A technician who does not have the ability to diagnose a transmission failure may incorrectly recommend transmission replacement or overhaul.
True
A torque converter center hub is mounted on a one-way clutch and is splined to the transmission stator support shaft.
True
Apply devices, such as clutches and brakes, either drive or stop members in a planetary gear set in order to create the needed gear ratio.
True
As vehicle speed increases, centrifugal force causes weights inside the automatic transmission's governor to move outward on their pivots against the spring or hydraulic pressure in proportion to the vehicle speed.
True
Automatic transmissions are designed to prevent a downshift if that downshift would cause the engine to exceed the safe maximum RPM.
True
Because transmission line pressure must vary according to engine load and torque demand, other valves are used to act on the pressure regulator valve.
True
Comparing observations made on the test drive to clutch and band apply charts can aid the technician in choosing which additional tests will best help diagnose the failure.
True
Discoloration of a planetary gear set can be a sign of a failed lubrication circuit in the transmission and must be repaired before the discolored gears are replaced and the automatic transmission is placed back into service.
True
During a torque converter stall test, if engine rpm are lower than the specified rpm, it indicates one of two problems: either the engine has a problem or the torque converter has an internal malfunction.
True
During the test-drive of a vehicle with a suspected automatic transmission concern, it is critical to place the transmission in the same operating conditions as the customer stated the problem occurred in.
True
Identification of an environment means identifying unusual ambient conditions in which the vehicle is operating.
True
If the transmission oil is hot, the Powertrain Control Module (PCM) may decrease line pressure to compensate for internal leaks, as thinner oil flows past valves and seals more easily.
True
On electronically controlled transmissions, the operation of the Torque Converter Clutch (TCC) solenoid is monitored by the Powertrain Control Module (PCM) and can, but may not always, set Diagnostic Trouble Codes (DTCs) if a fault is present.
True
Periodic maintenance is designed to reduce transmission failure and save the customer money in the long run.
True
Shifting can occur, in some transmissions, when the computer commands a solenoid valve to allow line pressure to be directly sent to the correct application device to complete the shift.
True
Simply put, Pascal's law states that if we place fluid in a confined space, pressure will be transferred equally, in all directions inside that space.
True
Some automatic transmissions may have a threaded plug located on the transmission case that you remove while the vehicle is running to check the automatic transmission fluid level.
True
Some vacuum modulators are adjustable.
True
The automatic transmission fluid must be able to transfer heat from the internal components of the transmission to the transmission cooler in order to prevent damaging the internal seals of the transmission.
True
The automatic transmission's pressure regulator valve keeps the pressure at a regulated level by exhausting excess pressure back to the transmission pan.
True
The bottom transmission pan is often removed during routine transmission fluid service to change the filter and clean a magnet, if equipped, located inside the pan that catches small particles of steel and iron that are floating in the fluid.
True
The front pump bushing is used to support the torque converter and sees the largest amount of wear in the transmission because it is in use anytime the engine is running.
True
The shift valves are held to the downshift side of their bores by springs.
True
The technician should know what the exact problem an automatic transmission has before removing the transmission from the vehicle.
True
Throttle Position Sensors (TPS) typically return around 0.5V when the throttle is closed, and approximately 4.5V when the throttle is wide open.
True
Torque multiplication within a torque converter is automatically adjusted, within design limits, by the difference in speed between the impeller and turbine.
True
Transmission repairs that are completed with an automatic transmission still in the vehicle are often less expensive than removing the transmission for a complete rebuild.
True
Which of the following torque converter parts are similar in construction?
Turbine and impeller
Which of the following is another name for the input shaft speed sensor?
Turbine speed sensor
In a computerized transmission, which of the component below replaces the governor?
Vehicle speed sensor (VSS)
Transmission coolers can be cleaned by:
an aerosol flushing kit.
Which of the following is not an element of a single stage torque converter?
band
Pascal's law states that if we place fluid in a confined space, pressure will:
be transferred equally in all directions inside the space.
As the vehicle begins to move from a stop, torque multiplication is minimal because there is a large difference between the speed of the impeller and the turbine.
false
When the manual valve is in park position, the line pressure:
is not able to flow past the valve to any other components of the transmission.
Planetary gears are held in place by a:
planet carrier
When disassembling a transmission, it is good to disassemble it into its unit assemblies because it helps in all of the following except:
preserves the warranty
An electromechanical device used to control oil flow to bands and clutches in an automatic transmission is the:
shift solenoid.
A pressure regulator valve ensures that:
the pressures are reduced during cruise, when less clutch and band holding power is needed.
The front pump sends fluid out under pressure to all of the following EXCEPT:
transmission pan
A torque converter does all of the following except:
transmits lower amounts of torque when driving away from a stop.
In the variable displacement pump, the pump housing can pivot in relation to the rotor.
true
When diagnosing problems in the transmission:
use accurate service information.
Transmission pressure switches are:
used to determine what gear the transmission is operating in.
Harsh-shifting transmission could be caused:
when the line pressure is too high during normal cruising speeds.
If the clutch pack has too little clearance, the clutch:
will drag when it is disenagaged
