Auto - Trans midterm

A normal vacuum gauge reading while the engine is idling is steady and at ____________ the rougher the engine runs the more the gauge readings will fluctuate.

17. In H

How much fluid should flow through the cooler during a twenty second test With your cooler line disconnected?

32 ounces

Simple planetary gearsets are being discussed. Technician A says any one of the three members can be used as the driving or input member. Technician B says the driven or output member is always the ring gear. Who is correct?

A only

Technician A says a Simpson gear train is an arrangement of two separate planetary gear sets with the common sun gear two ring gears to planetary pinion carriers. Technician B says a ravigneax gear set has two sun gears two sets of planet gears within a single carrier and two ring gears. Who is correct?

A only

Technician A says any engine movement may change the effective length of the shift and throttle cables. Technician B says if the drive line mounts are in good condition, there should be no engine movement when the throttle pedal is depressed with the brakes fully applied. Who is correct?

A only

Technician A says multiple disc clutch packs are capable of holding or driving gearset members. Technician B says overriding or one way clutches are capable only of holding gearset members. Who is correct?

A only

Technician A says the turbine shaft is splined to the turbine and transfers power from the torque converter to the transmissions main drive shaft. Technician B says the transmission oil pump is driven by the turbine shaft. Who is correct?

A only

Technician A says thumps and grinding noises are often caused by bad thrust washers. Technician B says noise that is engine speed related and occurs in all gear ranges, including Park and neutral is likely caused by a bad planetary gear set. Who is correct?

A only

Technician A says transmission fluid overheating can be caused by a defect in the engine cooling system. Technician B says transmission cooler leaks can be diagnosed by removing and plugging the radiator hose inlet and outlet and pressurizing the radiator with 50 to 70 psi of shop air and checking for bubbles in the transmission fluid. Who is correct?

A only

Two technicians are discussing EPC solenoids. Technician A says the EPC solenoid is a pulse width modulated solenoid and receives a duty cycle signal from the TCM. Technician B says the EPC solenoid is an on/off solenoid and is turned on when the TCM sees the three to four up shift. Who is correct?

A only

Incorrect pressure readings may reveal a possible problem in which of the following hydraulic circuits?

All answers

Low fluid levels can cause ___________ .

All answers

The computer controlled transmission that starts out in the wrong gear could be caused by _____________ .

All answers

The function of automatic transmission fluid is to ____________ .

All answers

When a Toyota/Lexus hybrid vehicle is operating under heavy loads, _________________ .

All answers

Which of the following tools is not used the check throttle position sensor?

Ammeter

Technician A measures a sensor only when it is cold. Technician B uses dielectric grease on electrical connections to prevent corrosion. Who is correct?

B only

Technician A says all automatic transmissions use the same type of fluid. Technician B says each manufacturer specifies the proper type of fluid that should be used in their transmissions. Who is correct?

B only

Technician A says the only positive way to identify the model of transmission is by the shape of the oil pan. .........................

B only

Technician B says torque converters are three piece units that are bolted together and can be easily disassembled for cleaning and repairs. Technician B says torque converter is completely filled with pressurized fluid. Who is correct?

B only

The customer complains that the vehicle can roll when the transmission is in park. Also, the starter does not crank the engine over when the shifter is in park. It will crank over when the shifter is halfway between neutral and drive on a road test and the transmission has shifted into manual low the gear indicator is halfway between one and two. Technician A says the parking pawel is broken and must be replaced. Technician B says the shifter linkage needs to be adjusted. Who is correct?

B only

The ravigneax gearset has?

B only

Transmission rebuilding procedures are being discussed. Technician A says always replace internal drive chains. Technician B says soak all friction material in clean ATF prior to installing them. Who is correct?

B only

Two technicians are discussing transmission bearings. Technician A says thrust washers are used to support radial loads. Technician B says thrust washers are used to support axial loads. Who is correct?

B only

Two technicians are discussing transmission oil pumps. Technician A says the oil pump is driven by the turbine shaft. Technician B says the pump is driven by the hub on the back of the converter housing. Who is correct?

B only

Single wrap and double wrap are types of _______________.

Band material

A CVT transmission uses __________ to provide speed reduction and torque multiplication.

Belt and pulleys

...................... Besides the torque converter. Technician B says a stall test is performed to check the operation of the clutches and bands inside the transmission. Who is correct?

Both

A tapered roller bearing is designed to accept ______________ loads.

Both

A technician is diagnosing a car that lacks power during acceleration. There are no DTC's and a check of the ignition and fuel system does not reveal any problems. Technician A says the exhaust system should be checked for restriction. Technician B says the stator or overrunning clutch inside the torque converter can be slipping. Who is correct?

Both

A technician is diagnosing a vehicle that does not crank over when the gear selector is in park or neutral that does crank when the gear selector is in reverse and drive. Technician A says the neutral safety switch means adjustment. Technician B says the gear selector linkage needs to be adjusted. Who is correct?

Both

Hydraulic valve designs are being discussed. Technician A says spool valves have at least two lands that are connected by a thin stem. Technician B says check ball and pop it are valve designs. Who is correct?

Both

Over running clutches are capable of ___________ .

Both

Technician A checks for worn or broken transmission mounts by prying on the transmission case with a pry bar while watching the mount. Technician B checks for worn or broken transmission mounts by running the engine at 1500 RPM with the transmission in drive and then in reverse while he watches the torque reaction or movement of the engine. Who is correct?

Both

Technician A checks transmission mounts with a pry bar by pulling up and pushing down on the transaxle ....................... while watching the mouth. Who is correct?

Both

Technician A says a low fluid level can cause fluid aeration. Technician B says a high fluid level can cause fluid aeration. Who is correct?

Both

Technician A says a purpose of a lock up piston clutch is to improve fuel economy. Technician B says a lock up piston clutch is designed with a damper assembly to transmit driving torque and absorb shock. Who is correct?

Both

Technician A says a simple planetary gearset can provide to reverse gear ratios. Technician B says a simple planetary gearset can provide two forward reduction ratios. Who is correct?

Both

Technician A says delayed shifts may be caused by leaking hydraulic circuits. Technician B says says poor engine performance can cause delayed shifts. Who is correct?

Both

Technician A says driveline vibration that changes with engine speed can be caused by an unbalanced torque converter. Technician B says driveline vibration that changes with road speed can be caused by a bad universal joint. Who is correct?

Both

Technician A says that when the Sun and the ring gear are both locked, and the carrier is the output condition his direct drive. Technician B says the carrier and the sun are both driven in the ring gear is the output, the condition is direct drive. Who is correct?

Both

Technician A says the names of the components inside an automatic transmission are based on their function, namely what gear they are used to control. Technician B says the names of the clutches, bands, and servos are based on their location in the transmission. Who is correct?

Both

Technician A says the transmission identification number is found on a sticker or stamped on the transmission case. Technician B says the vehicle certification label gives transmission information in a space marked TR. Who is correct?

Both

Technician A says the transmission oil pump is driven by the converter shell and continually delivers transmission fluid under pressure into the torque converter through the hollow shaft at the center axis of the converter assembly. Technician B says transmission fluid leaving the turbine is directed out of the torque converter to an external cooler and then to the transmissions oil sump or pan. Who is correct?

Both

Technician A says vortex flow is the flow transmission fluid from the center to the outside edge and back. Technician B says rotary flow is a flow around the circumference of the torque converter. Who is correct?

Both

Two technicians are discussing band adjustment. Technician A says the band adjustment screws are located on the outside of the transmission case. Technician B says the band adjustment screws are located inside the transmission and the transmission path must be removed to make the adjustments. Who is correct?

Both

Two technicians are discussing band lining material. technician A says the band lining material is a semi metallic compound. Technician B says the band lining material is paper based. Who is correct?

Both

Two technicians are discussing the operation of the Toyota/Lexus hybrid transaxle. Technician A says that the vehicle is driven electrically by MG2 when the transmission selector is in reverse. Technician B says that whenever the car car is powered by MG2 the engine may start if the battery state of charge is low. Who is correct?

Both

Two technicians are discussing transmission fluid. Technician A says transmission fluid is red in color and has no dark aura metallic particles suspended in it. Technician B says synthetic ATF is normally a darker red than petroleum based fluid and tends to look and smell burnt after normal use. Who is correct?

Both

Two technicians are testing a transmission that has a DTC for a shift solenoid. The coil resistance is within specifications and the solenoid clicks when the coil is energized with jumper wires. Technician A says the solenoid could be leaking internally or externally. Technician B says the valve within the solenoid could be sticking or binding. Who is correct?

Both

Two technicians are trying to install a remanufactured transmission and torque converter in a vehicle. No matter how well they align the transmission with the engine the transmission will not slide on to the dowel pins. Technician A says the pilot hub on the converter could be damaged. Technician B says one of the dowel pins could be out of round. Who is correct?

Both

The function of the throttle valve and the valve body is to?

C

In the Toyota/Lexus hybrid transaxle the engine output is coupled to what component or the planetary gearset?

Carrier

Which of the following is not a type of pump used in an automatic transmission?

Centrifigual

When hydraulic pressure is applied to one side of a _________ servo the band is applied. When hydraulic pressure is applied to the opposite side of the piston the band is released.

Compound servo

The first step to diagnosing an EAT transmission problem is to __________________ .

Connect scan tool

Which of the following is NOT a type of rubber seal used in an automatic transmission?

Counterbore

If the crankshaft speed sensor reads 1650 rpm and the turbine speed sensor also read 1650 RPM, the torque converter is _____________ .

Coupled

The Toyota/Lexus hybrid transaxle uses a __________ that combines the power from the gasoline engine with the power from the electric motors.

D

The __________ is a voltage generating sensor that uses a hall effect or pm generator to produces a signal.

D

The dual mode hybrid transmission contains all of the following components except?

D

The customer complains of a shutter that occurs at light throttle just when the vehicle reaches 45 miles per hour. The shutter lasts for a few seconds and stops until the vehicle slows down and speeds back up to 45 miles per hour. The problem could be?

Defective TCC solenoid

Which of the following is not a component of the Toyota/Lexus hybrid?

Differential

If the sun gear and the planetary gears in a planetary gearset are both driven or locked together gear ratio will be __________ .

Direct drive

Input split and compound split are two modes of operation in a _________________ type transmission.

Dual mode hybrid

Which of the following is not a TCM input signal?

Duty Cycle

The transmission for many hybrid vehicles uses ___________ to drive and hold planetary gearset elements.

Electric motors

During a road test the engine speed flares up during acceleration and drive. What is most likely cause of the problem?

Engine Slip

During a stall test the engine speed was 50 RPM below the minimum stall speed. What is the most likely problem?

Engine is not producing enough power

A leaking transmission pump seal can be replaced without removing the transmission

False

All automatic transaxles use a simple planetary gearset.

False

Faulty wiring connector will not affect shift timing.

False

Most transmission shops rebuild the torque converter when overhauling the transmission.

False

On all automatic transmissions, the fluid level is always checked with the engine running and the transmission in park.

False

On the Toyota Lexus automatic transmissions with manual control drivers must exercise caution when manually shifting to prevent engine or transmission failure.

False

PCM input data such as map TP and engine speed cannot be transferred to the TCM to the vehicle CAN Bus.

False

Some manufacturers do not recommend pressure testing automatic transmissions.

False

Spool valve springs and other components of the valve body should be cleaned using a wiping rag or paper towel.

False

The Toyota/Lexus hybrid is driven by MG1 when running solely on electric power.

False

The transmission fluid and filter should be changed only when there is an indication of oxidation or contamination.

False

To test the solenoid with an ohm meter, the transmission pan must be removed.

False

When a sun gear is the input member and the planetary carrier is held, the ring gear will be driven at a forward overdrive speed.

False

A non electronically controlled transmission with improper shift points are most commonly caused by a __________ .

Faulty governor

Which of the following pressures increases as road speed increases?

Governor pressure

Which of the following is not an advantage of an electronically controlled transmission?

Higher torque capacity

What manufacture invents automatic transaxles that do not use planetary gears that are similar in construction and operation to manual transaxles?

Honda and Acura

Transmission coolers are normally located ______________ .

In the radiator

What tool is needed to adjust the bands?

In. - Lbs. Torque wrench

What will be the symptoms of a throttle valve linkage that is adjusted to high?

Late upshifts and early downshifts

Which of the following statements concerning the operating characteristics of an EAT during limping mode is NOT true?

Locks into 4th gear when put into drive

When a Toyota/Lexus hybrid is driving on electric power, If more torque is needed __________ is activated to start the engine.

MG1

Butt-end, open end, and hook and are types of ____________ .

Metal sealing rings

Early upshifts can be caused by ______________ .

Misadjusted TV cable

At coupling speed the overriding clutch and the torque converter is ___________________ .

Moving forward

A Belleville spring is commonly found inside a __________ .

Multiple disc clutch

Low fluid level may be caused by a leak in all of the following except?

Multiple disc clutch piston seal

Technician A says Teflon seals are harder and wear the seals surface faster than metal seals. Technician B says scarf cut Teflon seals require special tools for installation. Who is correct?

Neither

Technician A says devices that control radial loads are called thrust washers. Technician B says devices that control axial loads are called bearings or bushings. Who is correct?

Neither

Technician A says the only positive way to identify the exact design of the transmission is the ..................

Neither

Which of these engine control sensors is not likely to cause shifting problems?

O2 sensor

A technician is diagnosing a transmission fluid leak problem with the inspection cover removed. There is fluid on the back of the converter shell but the front of the converter is dry. What is the most likely source of leak?

Oil pump seal

Shift pressure control and torque converter clutch solenoids are usually located on the?

On the valve body

When testing a solenoid with an ohm meter an infinite reading across the solenoid coil indicates that _____________________ .

Open

A vibration that changes with a change in engine speed is most likely caused by a ________________ .

Out of balance torque converter

To achieve a slow forward overdrive in a simple planetary gearset the ___________________ .

Planetary carrier must be the input.

To boost transmission line pressure, throttle pressure is applied to the _______________ .

Pressure regulator spool valve

Air pressure can be used to test............

Pressure switches

In a simple planetary gearset when the planetary carrier is held the gearset produces a _______________ .

Reverse

In a simple planetary gearset whenever the planetary carrier is held the condition will be?

Reverse

Which of the following is not a component of your torque converter clutch?

Roller clutch

All the following components of the torque converter except?

Rotor

Which of the following components is NOT part of the lockup torque converter?

Servo spring

A _______________ contains the actual shift points to be used by the computer according to the input data received from the sensors.

Shift schedule

When transmission fluid temperature is too high the TCM will cause the transmission to ______________ .

Shift sooner than normal

A magnetic pulse generator type sensor is commonly used to measure __________ on an EAT transmission.

Speed

_______________ type and roller overrunning clutches are used to hold or drive members of the planetary gears that in one direction and allow them to freewheel in the opposite.

Sprag

The multiplier of torque converter fluid power is the________________ .

Stator

The overrunning clutch inside the torque converter is attached to the?

Stator

The application of the torque converter clutch is controlled by the?

TCC solenoid

The transmission fluid temperature sensor is a ________ and its output signal varies with ATF temperature.

Thermistor

What type of sensor that is listed here as a potentiometer?

Throttle position sensor

When the pressure regulator valve begins to operate the line pressure first follows to the _________________ .

Torque converter

_________________ bearings are thrust washers fitted with roller bearings.

Torrington

When should the ATF level be checked on most vehicles?

Transmission at operating temperature and engine running

A DTC for an input signal that is too low or too high can be caused by an internal transmission mechanical or hydraulic failure.

True

Air pressure tests are performed during disassembly to locate leaking seals and during reassembly to check the operation of the clutches and servos.

True

An engine vacuum leak can cause degraded shift quality.

True

Belleville type clutch piston return spring can be used to multiply the force applied to the clutch in addition to releasing the clutch when hydraulic pressure is removed.

True

Check ball is a simple hydraulic valve.

True

Hypoid final drive gear assemblies are normally found in vehicles with longitudinally placed engine.

True

In addition to conventional snap rings, some are wave shaped, and some are available in different thicknesses to adjust multiple disc clutch pack clearance.

True

In addition to the compound planetary gearsets many automatic transmissions are fitted with an additional single planetary gearset to provide additional forward gear ratios

True

Lip seals are sometimes built into ball bearings to retain lubricants.

True

Slippage during shifting may indicate that a band needs adjustment.

True

Synthetic fluids tend to look and smell burnt after normal use. Therefore the appearance and smell of these fluids is not a good indicator of the fluids condition.

True

TV-tuner cleaning spray is a good solid use for cleaning electrical terminals and connectors.

True

The EPC solenoid provides changes in pressure in response to engine load.

True

The gear range selector linkage must be adjusted properly to prevent fluid line pressure loss from the manual valve.

True

The valve body assembly is comprised of the valve body, separator plate, and transfer plate.

True

Whenever two members of a simple planetary gear set are locked together, that output will be direct drive.

True

Which of the following torque converter components connects to the transmission input shaft?

Turbine

Dark particles in the transmission fluid are an indication of ___________ .

Worn clutches or bands

On a road test, a thumping noise is heard in the transmission whenever the vehicle is accelerated. What could be the problem?

Worn thrust washers

Technician A says a prerequisite to accurate road testing analysis includes knowing what bands and clutches are applied in a particular gear range. technician B says slipping conditions can be caused by a leaking hydraulic circuit. Who is correct?

both

Technician A says if the ATF has a dark brownish or blackish color and or a burned odor the fluid has been overheated. Technician B says that the fluid has a milky color this indicates that engine coolant has been leaking into the transmission cooler. Who is correct?

both

Technician A uses a 400 psi pressure gauge to test mainline pressure. Technician B uses 100 psi gauge to test throttle valve and Governor pressure. Who is correct?

both

Two technicians are discussing CVT transmissions. Technician A says that when a CVT equipped car is accelerating, the engine RPM remains constant as the mile per hour increases. Technician B says that some CVT vehicles do not have torque converters, they use multiple disc starting clutch for idling and starting from a dead stop. Who is correct?

both

What tool is needed to properly adjust transmission bands?

in. - lbs. torque wrench

If the noise is engine speed related and present in all gears including Park and neutral, the most probable source is __________________ .

transmission oil pump

A plugged transmission cooler lines or an already restricted cooler can cause the vehicle to stall and shifted in reverse.

true