Automatic Transmissions Final: Chapters 4, 5, 6, 7, & 10
Which of the following is used in all automatic transmissions?
All of the above
An output shaft or final drive endplay check should be made on either a transmission or transaxle. Technician A says this is done to provide long gear life and to eliminate engagement "clunk" Technician B says endplay should be measured durning teardown, which helps obtain the shims necessary to correct undesired endplay.
Both
Technician A says a Simpson gears is two planetary gear sets that share a common sun gear. Technician B says a Ravigneaux gear set has two sun gears, two sets of planet gears, and a common ring gear. Who is correct?
Both
Technician A says mainline pressure is the source of all other pressures used by the transmission. Technician B says mainline pressure is the pressure used to apply clutch. Who is correct?
Both
Technician A says most CVTs that use a steel belt are called push-type units. Technician B says CVTs that use a chain to drive the pulleys are called pull-type units. Who is correct?
Both
Technician A says when the speed of the turbine nearly equals the speed of the impeller, fluid flows against the stator vanes in the same direction as the fluid from the impeller. Technician B says when there is little vortex flow and the engine's torque is carried through the converter by the rotary flow of the fluid, the coupling phase of the torque converter occurs and no torque multiplication takes place. who is correct?
Both
Technician A says when the transmission is in gear, the fluid coupling allows the vehicle to stop without stalling. Technician B says this is because the impeller doesn't rotate fast enough to drive the turbine. Who is correct?
Both
Technician A says torque converter clutch control problems are always caused by electrical malfunctions. Technician B says nearly all converter clutches are engaged through the application of hydraulic pressure on the clutch. Who is correct?
B only
While discussing Honda's five-speed transaxle: Technician A says it has multiple-disc clutch packs and a one-way clutch. Technician B says it is equipped with seven solenoids. Who is correct?
Both
Pulse Width is:
The length of time something is energized
While discussing the construction of typical converter clutch assemblies: Technician A says the clutch plate is splined to the turbine shaft, and when the piston is applied, the plate connects the turbine to the converter. Technician B says the piston and clutch plate assembly has frictional material on the outside of the plate with a spring-cushioned damper assembly in the center. Who is correct?
both
While discussing transmission adaptive learning: Technician A says this learning process allows the TCM to make adjustments to its program so that quality shifting always occurs. Technician B says the TCM learns to respond to the drivers driving habits.
both
Technician A says GM's 6L80 was co-developed with Ford Motor Company. Technician B says GM's 6L50 was co-developed with Ford Motor Company. Who is correct?
neither
Technician A says that a relief valve prevents or allows fluid flow until a particular pressure is reached. Technician B says that a relief valve prevents pressures from going too low. Who is correct?
neither
Technician A says that if a valve cannot be cleaned well enough to move freely in its bore, the valve body should be replaced. Technician B says that if there is even the slightest bit of damage or varnish buildup in a valves bore, the entire valve body should be replaced.
neither
While discussing Gm's 4t80 series transaxles: Technician A says the series does not use an electronically controlled torque converter, rather transaxles use a viscous clutch. Technician B says the transaxles have four separate oil pumps. Who is correct?
neither
Technician A says an ammeter without an inductive pickup is always connected in series with the circuit it is testing. Technician B says an ammeter is only used when the power for the circuit is disconnected.
A only?
Overruning clutches are capable of ______.
A only
Technician A says a cooler located in the radiator can be replaced by a radiator shop if necessary. Technician B says if an external cooler is plugged it may make sense to replace it. Who is correct?
A only
Technician A says a nonpositive static seal will allow some fluid leakage between two parts that do not move in relationship to each other. Technician B says a positive dynamic seal allows a controlled amount of leakage between two parts that move in relationship to each other. Who is correct?
A only
Technician A says a simple check valve is used to block hydraulic passageways. Technician B says it normally stops fluid flow in both directions. Who is correct?
A only
Technician A says an ohmmeter can be used to test semiconductors. Technician B says a low-impedance ohmmeter should be used on electronic circuits.
A only
Technician A says engine load can be monitored electronically through the use of various electronic sensors that send information to an electronic control unit. Technician B says the most commonly used load sensor is a vehicle speed sensor. Who is correct?
A only
Technician A says once the transmission is removed and before it is disassembled, the outside of the transmission should be cleaned. Technician B says no matter what type of cleaning procedure is followed, the transmission and parts should be rinsed with water and then thoroughly dried with compressed air before reassembly.
A only
Technician A says seals should be kept clean and free of dirt, before and durning installation. Technician B says most seals should be installed dry.
A only
Technician A says shift solenoids either allow or block fluid flow from the various apply devices in the transmission. Technician B says shift solenoids are used to mechanically apply a brake band or multiple-disc clutch assembly. Who is correct?
A only
Technician A says spool valves are the most commonly used valve in an automatic transmission. Technician B says spool valve are normally used as relief valves. Who is correct?
A only
Technician A says the output shaft connects the output of a driving member to the final drive unit. Technician B says the input shaft connects the impeller of the torque converter to the front driven member in the transmission. Who is correct?
A only
Technician A says the pressure-regulator valve usually has the responsibility for filling the torque converter. Technician B says the pressure-regulator valve usually has the responsibility of keeping the fluid flowing by making sure the pressure is never balanced. Who is correct?
A only
While discussing JATCO transmissions: Technician A says these units are used in Nissans. Technician B says these units are used in Hondas. Who is correct?
A only
While discussing shift pressure control valves: Technician A says that these valves can apply different pressures to a clutch pack depending not the commands from the TCM. Technician B says that modern transmissions do not use shift pressure control valves.
A only
While discussing the operation of the stator: Technician A says the stator redirects the fluid leaving the turbine back to the impeller. Technician B says only a portion of the fluid returning from the turbine to the impeller passes through the stator. Who is correct?
A only
While discussing transmission lip seals: Technician A says the most important thing when installing a lip seal is to make sure the lip is facing in the correct direction. Technician B says the lip should always be aimed away from the source of pressurized fluid.
A only
While servicing a variable-displacement vane-type pump: Technician A says the pump rotor, vanes, and slide have selective sizes and may destroy the pump if the correct ones are not used. Technician B says the outer edge of the vanes should be flat. Who is correct?
A only
technician A says before tearing down a transmission, you should inspect the debris trapped in the fluid filter. technician B says installing an overhaul kit will take care of all the problems with a transmission.
A only
While checking torque converter endplay: Technician A says the torque converter must be installed in the transmission. Technician B says the torque converter endplay is corrected by installing a thrust washer between the oil pump and the direct or front clutch. Who is correct?
A only???
Which of the following statements about electrical problems is NOT true? A. A short will cause the components in the circuit to operate poorly because of increased current flow to them. B. in an open circuit, there will be no current flow. C. If there is an opening in one leg of a parallel circuit, the remaining part of that parallel circuit will operate normally. D. Excessive resistance at a connector, internally in a component, or within a wire will cause low current flow and the component will not be able to operate normally, if at all.
A. A short will cause the components in the circuit to operate poorly because of increased current flow to them.
The spool valve's movement is controlled by:
All: hydraulic, spring, and mechanical
Technician A says Ford's AXOD is a non-synchronous transmission. Technician B says the AX4N is a non synchronous unit. Who is correct?
B only
Technician A says a transistor is used to measure transmission temperature. Technician B says the PCM changes the operation fo many systems based on temperature.
B only
Technician A says a transmission orifice is a bore in a passage that is larger than the connecting passages. Technician B says an orifice is used to dampen a fluid flow to prevent sudden or undue movement of a control valve. Who is correct?
B only
Technician A says high current is caused by high resistance. Technician B says a short to ground can occur internally within a component.
B only
Technician A says never use a magnet to remove the check balls. Technician B says to be sure to do something that will help you remember where the balls were, such as a photograph or drawing their location.
B only
Technician A says the rear hub of the torque converter is bolted to the flex plate. Technician B says the flex plate is designed to be flexible enough to allow the front of the converter to move forward or backward if it expands or contracts because of heat or pressure. Who is correct?
B only
Technician A says when removing a seal, inspect the sealing surface or lips. Technician B says this check should be done before cleaning the seal.
B only
While discussing Fords transaxles: Technician A says the CD4E is similar in design to the AXOD. Technician B says the 4F27 is similar to the CD4E. Who is correct?
B only
While discussing valve body assemblies in late-model transmissions: Technician A says the valve body is no longer needed in some electronically controlled transmissions. Technician B says an EPC solenoid maintains constant fluid pressure through the valve body regardless of the vehicle's operating conditions.
B only
While inspecting a valve body: Technician A says deep scratches in a valve's bore can be removed with #600-grit abrasive paper. Technician B says one of the most common transmission problems is excessive valve body bore wear due to the constant shuffling of the valves by a duty-cycle solenoid.
B only
Which of the following statements is NOT true? A. A torque converter uses hydraulic fluid flow to connect and disconnect the power of the engine to and from the transmission. B. The transmission pump is driven by the input shaft. C. The valve body contains the valves and orifices that control the operation of the transmission. D. The transmission pump is the main source of fluid flow in the transmission.
B. The transmission pump is driven by the input shaft.
Technician A says a ballooned torque converter can cause damage to the oil pump. Technician B says a ballooned torque converter is caused by excessive pressure in the torque converter. Who is correct?
Both
Technician A says a multiple-disc clutch can be used to drive a planetary member. Technician B says a multiple-disc clutch can be used to brake or hold a planetary member. Who is correct?
Both
Technician A says a scratched separator plate must be replaced. Technician B says make sure all drain back openings in the spacer plate are clear.
Both
Technician A says a seized one-way stator clutch will cause the vehicle to have good low-speed operation but poor high-speed operation. Technician B says a freewheeling or non-locking one-way stator clutch will cause the vehicle to have poor acceleration. Who is correct?
Both
Technician A says electrical components from the valve body must not be soaked in parts cleaner. Technician B says a lint-free rag is a must when wiping down valves. Who is correct?
Both
Technician A says engine/transaxle mounts isolate the inherent vibrations of the assembly from the passenger compartment. Technician B says improper mounting of an engine and/or transmission can cause problems with the transmission. Who is correct?
Both
Technician A says most late-model GM transmissions feature their Electronic Controlled Capacity Clutch (ECCC) system. Technician B says the ECCC allows for a variable amount of clutch slippage. Who is correct?
Both
Technician A says multiplexing allows information to be shared with many computers. Technician B says multiplexing reduces the number of wires and components needed in current vehicles.
Both
Technician A says over-torquing the hold-down bolts of the valve body can cause the valves to stick in their bores. Technician B says flat-filing the surface of the valve body will allow the valve body to seal properly and prevent cross leaks.
Both
Technician A says piston seals are designed to seal against high pressures. Technician B says the seal is positioned so that the lip faces the source of the pressurized fluid. Who is correct?
Both
Technician A says that if diagnosis suggests a problem with only one or two valves, visual inspection of the valve body should start at those valves. Technician B says that if the transmission has heavily contaminated fluid, the entire valve body should be inspected and cleaned, or replaced.
Both
Technician A says that if the stall speed of a torque converter is below specifications, a restricted exhaust or slipping stator clutch is indicated. Technician B says that if the stall speed is above specifications, the bands or clutches in the transmission may not be holding properly. who is correct?
Both
Technician A says that in a vane-type pump, the vane ring contains several sliding vanes that seal against a slide mounted in the pump housing. Technician B says vane-type pumps are variable-displacement pumps whose output can be reduced when high fluid volumes are not necessary. who is correct?
Both
Technician A says the default gear is the normal gear selection. Technician B sys the default gear is normally the gear selected by the TCM when the solenoids are off.
Both
Technician A says the gears in a gear-type oil pump should be replaced if the outer edges of the teeth are worn flat. Technician B says all parts of gear-type pumps are selectively size. Who is correct?
Both
Technician A says the waveform created by AC voltage is typically called a sine wave. Technician B says one complete sine wave is a cycle.
Both
Technician A says throttle position is an important input in most electronic shift control systems. Technician B says vehicle speed is an important input for most electronic shift control systems.
Both
Technician A says vibration problems can be caused by an unbalanced torque converter. Technician B says vibration problems can be caused by a faulty output shaft.
Both
When inspecting valves from the valve body: Technician A says the edges of the spools should be damage-free but should not be sharp. Technician B says to identify a bent valve, install it into its bore and rotate it. If it binds or drags while it is being rotated, it is bent.
Both
While Checking a transmission range sensor: Technician A says typically the range sensor is actually made up of several switches. Technician B says a faulty TR sensor may allow the engine to start in other gear positions besides Park and Neutral.
Both
While assembling a valve body after cleaning it: Technician A lubricates all parts with clean ATF. Technician B says it is important that the valve-retaining plugs or caps be placed in the correct bore and in the correct direction.
Both
While checking a switch: Technician A says a multimeter is a meter that combines the function of a voltmeter, an ammeter, and an ohmmeter. Technician B says impedance is best defined as the operating resistance of an electrical device.
Both
While checking a transmission's vent: Technician A applies a vacuum to it and says that if the vent leaks, it should be replaced. Technician B runs ATF through the vent and says that if the vent cannot hold fluid, it must be replaced.
Both
While checking voltage drops: Technician A connects the voltmeter across the load with the circuit activated. Technician B connects the negative meter lead to ground and the positive lead to the component being tested.
Both
While discussing GM torque converters: Technician A says the TCC assembly allows for a mechanical link between the impeller and the turbine. Technician B says this is true during all gear ranges except Park, Reverse, Neutral, and Drive Range-First Gear. Who is correct?
Both
While discussing boost pressures: Technician A says during certain operating conditions, mainline pressure must be boosted. Technician B says increased pressure is needed to hold brakes and clutches more tightly, such as in reverse or high load conditions. Who is correct?
Both
While discussing endplay checks: Technician A says these checks should be taken before the transmission is disassembled. Technician B says these checks should be taken after the transmission is reassembled.
Both
While discussing some control modules: Technician A says some transmissions have a single assembly that contains all of the solenoids, the TCM, and a lead frame assembly. Technician B says the lead frame connects to the individual components, therefore fewer electrical connection are needed for those transmissions, eliminated many potential problems.
Both
While discussing the THM 4T60: Technician A says the 4T60 was the first domestically produced four-speed automatic transaxle built for FWD vehicles. Technician B says the 4T60 uses two tandem planetary units, which do not share a common gearset member. who is correct?
Both
While discussing torque converter clutch engagement solenoids: Technician A says some systems use a P generator-type solenoid, which allows for a full-time, but controlled slip. Technician B says some converter control systems use a pulse-width modulate solenoid. Who is correct.
Both
technician A says a converter that has a tight fit at the pilot hub should hold the converter drive hub and inner gear too far into the pump, causing cover scoring. Technician B says a front pump bushing that has too much clearance may allow the gears to run off center, causing them to wear into the crescent or the sides of the pump body. Who is correct?
Both
While discussing transmission solenoids: Tech A says the TCM relies on information from the engine control system, transmitted through such sensors as the MAP and TP sensor, as well as information from the transmission, to determine the optimum shift timing. Tech B says the TCC solenoid can be modulated to smooth the engagement of the torque converter clutch. Who is correct?
Both Technicians
Some transmission control systems monitor the speed of the input shaft and compare it to the speed of the output shaft to determine the ______.
Gear Ratios
While discussing various sensors used with an electronic transmission control system: Technician A says potentiometers are typically used to measure temperature changes. Technician B says MAP sensors are used to measure engine load. Who is correct?
Neither
Voltage generation devices are typically used to monitor rotational speeds. Which of the following is NOT a voltage-generating type sensor?
MAP
Technician A says a generic DTC is designated by a PIXXX or P2XXX code. Technician B says manufacturer-spacific codes are designated by P0XXX codes.
Neither
Technician A says abnormal noises from a transmission will never be caused by faulty clutches or bands. Technician B says abnormal noises from a transmission are typically caused by a faulty torque converter.
Neither
Technician A says shift solenoids direct fluid flow to and away from the various apply devices in the transmission. Technician B says shift solenoids are used to mechanically apply a friction band brake or multiple-disc clutch assembly. Who is correct?
Neither
While checking the stall speed of a torque converter: Technician A maintains full-throttle power until the engine stalls. Technician B manually engages the TCC bveofer running the test. Who is correct?
Neither
While discussing current manufacturer transmission coding: Technician A says Ford model numbers do not indicate the duty rating of the transmission. Technician B says Chrysler model numbers indicate the number of planetary units used in the transmission. Who is correct?
Neither
While discussing Toyota's AA80E transmissions: Technician A says the design is based on three planetary gear sets connected in series. Technician B says the unit relies on four multiple-disc clutches, two multiple-disc brakes, and one overrunning clutch. Who is correct?
both???
