Automatic Transmissions Flashcards
0
Q
When referring to automatic transmissions, the term gear ratio is expressed as the number of:
a. Input revolutions as compared to one revolution of the output.
b. Output revolutions as compared to one revolution of the input
c. Input revolutions as compared to two revolutions of the output.
d. Revolutions as compared to one revolutions of the input
A
a. Input revolutions as compared to one revolution of the output.
1
Q
Which of the following best describes the throttle valve, a function of the device or a condition of the device with a transmission in the park positions?
a. Line pressure is blocked at the inlet port at the manual valve. b. Line pressure is prevented from entering the throttle valve. c. Line pressure is prevented from entering the governor port. d. Line pressure is not prevented from entering the throttle valve.
A
b. Line pressure is prevented from entering the throttle valve.
2
Q
Additives added to automatic transmission fluid to control volatility will:
a. Maximize fluid vaporization b. Minimize fluid vaporization c. Protect against corrosion d. Protect against oxidation
A
b. Minimize fluid vaporization
3
Q
In a conventional three member torque converter, the fluid flows into the torque converter:
a. From the top down. b. Between the converter hub and the stator support. c. Between the stator support and the turbine shaft. d. From the front to the back.
A
b. Between the converter hub and the stator support.
4
Q
When referring to a simple planetary gear set in a transmission, the (blank) is the output member for reduction ranges.
a. Planetary carrier b. Pinion c. Sun d. Annulus
A
a. Planetary carrier
5
Q
Which of the following is not a benefit of using planetary gear sets in transmission?
a. Long life b. Compactness c. Lower torque d. Smooth ratio changes
A
c. Lower torque
6
Q
To transmit torque, through a compound planetary gear set, there must be a/an (blank) member, a driven member, and a held member.
a. Holding b. Drive c. External d. Output
A
b. Drive
7
Q
A vehicle automatic transmission has no 1-2 up shift, which OBD2 code would be present in the PCM?
a. P0800 b. C0200 c. B0500 d. T0100
A
a. P0800
8
Q
Which of the following controls up shift in an automatic transmission?
a. TPS and IAT b. TPS and VSS c. ECT and IAT d. MAF and ECT
A
b. TPS and VSS
9
Q
In a four speed automatic transmission, when the vehicle shift lever is applied in the PARK position the vehicle still wants to roll away. Which of the following would most likely cause this problem?
a. Shift selector switch b. Shifter linkages c. Torque converter d. VSS (vehicle speed sensor)
A
b. Shifter linkages
10
Q
When installing a complete transmission in a vehicle, which of the following is the first procedure to do after installation?
a. Reprogram ECU b. Set neutral / park switch c. ECU relearn d. Adjust shift detent
A
b. Set neutral / park switch
11
Q
What causes an automatic transmission not to shift in to 2nd and 3rd gear?
a. Open in solenoid #1 b. Open in solenoid #2 c. Open in both solenoid circuits d. Shorted both solenoids
A
c. Open in both solenoid circuits
12
Q
In a four speed automatic transmission with lock up torque converter, customer complaints about poor fuel economy. Which of the following would most likely cause this problem?
a. Defective brake switch b. Multi function position switch c. Shifter interlock solenoid d. Forward drive clutch
A
a. Defective brake switch
13
Q
After a transmission has been rebuilt, what is the first procedure to do before installing the transmission?
a. Reprogram ECU b. Flush cooler lines and replace transmission cooler c. Grease the output shaft d. Fill the transmission with fluids
A
b. Flush cooler lines and replace transmission cooler
14
Q
Customer complains of loosing transmission fluids but there are no visible leaks. Which of the following would most likely cause this problem?
a. Torque converter b. Transmission cooler lines c. Transmission cooler d. Modulator valve
A
d. Modulator valve
15
Q
Poor engine performance at high speed could be caused by?
a. Torque converter stator that will not Lock b. Torque converter stator HELD in one direction c. Torque converter stator locked in BOTH directions d. Siezed
A
b. Torque converter stator HELD in one direction
16
Q
Vehicle keeps shifting in and out of four-wheel drive on an AWD vehicle. What could be the problem?
a. Driving on a dry surface b. Driving on a wet surface c. Turning too sharply d. Different size tires on the vehicle
A
d. Different size tires on the vehicle
17
Q
When an automatic transmission has excessive input shaft end play. What will you do to correct the end play?
a. Brass shims b. Thicker forward clutch frictions c. Thicker direct clutch steels d. Selective washers
A
d. Selective washers
18
Q
When doing an automatic transmission service, what should you do after filling the transmission fluids?
a. Start the vehicle and run until operating temperature b. Start the vehicle and run through the gears c. Start the vehicle and put in drive d. Start the vehicle and put in neutral
A
b. Start the vehicle and run through the gears
19
Q
A torque converter is made up of these elements. They are:
a. Torus, stator and impeller b. Stator, turbine and impeller c. Pump, impeller, and stator d. Turbine, stator, and Torus
A
b. Stator, turbine and impeller
20
Q
At torque converter stall:
a. Two members are stationary and one is turning b. One member is stationary and two are turning c. None of the members are stationary d. All of the members are stationary
A
a. Two members are rotating
21
Q
At the coupling point:
a. All members are rotating b. Two members are stationary and one is turning c. There is no vortex flow d. There is no rotary flow
A
a. All members are rotating
22
Q
Torque multiplication is greater at what speed?
a. Low speed b. Cruising speed c. High speed d. On the float
A
a. Low speed
23
Q
A torque converter one way clutch that will not hold will cause:
a. High fuel consumption at high speed b. Poor performance at high speed c. Poor torque multiplication at high speed d. Low engine rpm. at converter stall
A
d. Low engine rpm. at converter stall
24
A torque converter roller clutch that is locked in both directions will cause:
a. Low engine rpm. at low speeds
b. Poor torque multiplication at low speed
c. Poor engine performance at high speed
d. High fuel consumption at low speed
c. Poor engine performance at high speed
25
The purpose of the guide ring in a torque converter is to reduce the oil:
a. Movement between members
b. Turbulence
c. Level in the coupling phase
d. Impact Angle
b. Turbulence
26
The maximum time allowed for performing a stall test is:
a. 10 seconds
b. 5 seconds
c. 15 seconds
d. It does not matter
b. 5 seconds
27
When lock up torque converters lock they connect the:
a. Impeller to the input shaft
b. Impeller to the turbine
c. Turbine to the converter cover
d. Converter cover to the impeller
c. Turbine to the converter cover
28
Vortex flow is high when:
a. Engine at high stall speed
b. Vehicle at coupling point
c. Torque converter lock up
d. Vehicle is in coast mode
a. Engine at high stall speed
29
The lock up torque converter is most likely to lock under this condition:
a. Idle
b. Heavy acceleration
c. High gear and cruise
d. deceleration
c. High gear and cruise
30
The impeller is attached to:
a. The input shaft
b. The output shaft
c. The flex plate
d. The stator
c. The flex plate
31
The part of a planetary gear set that is held is called the:
a. Input member
b. Output member
c. Reaction member
d. Reduction member
c. Reaction member
32
Another name for the internal gear is the:
a. Pinion
b. Annulus
c. Axis
d. Reaction member
b. Annulus
33
A Simpson gear set shares a common
a. Ring gear
b. Sun gear
c. Planetary gears
d. None of the above
b. Sun gear
34
If the sun gear and the carrier are locked together and used for input, the output from the ring gear will be:
a. Gear reduction
b. a 1:1 ratio
c. Overdrive
d. Reverse
b. a 1:1 ratio
35
If the ring gear is used as input and the sun gear is held, the output from the carrier will be:
a. Gear reduction
b. Neutral
c. Overdrive
d. Reverse
a. Gear reduction
36
The difference between Ravigneaux and Simpson gear set is:
a. The Ravigneaux incorporates two sun gears
b. The Ravigneaux incorporates two carriers
c. The Simpson incororates a common ring gear
d. The Simpson can only be used with a band
a. The Ravigneaux incorporates two sun gears
37
A band can be:
a. Used for a driving member
b. Used for a brake
c. Adjustable
d. Both B and C
d. Both B (used for a brake) and C (adjustable)
38
Clutch's can be used for:
a. A driving member
b. A brake member
c. Both A and B
d. Neither A nor B
c. Both A and B
39
An automatic transmission multiple disc clutch is:
a. Non adjustable
b. Applied by an apply piston
c. Applied by main line pressure
d. All of the above
d. All of the above
40
The pressure in the transmission that increases with road speed is:
a. Mainline pressure
b. Throttle pressure
c. Governor pressure
d. Modulator pressure
c. Governor pressure
41
If the engine load is high, the manifold vacuum is low and the throttle is wide open, the throttle pressure will be:
a. Low
b. High
c. Moderate
d. Decreasing
b. High
42
Most of the heat in an automatic transmission is generated in the:
a. Pump
b. Gears
c. Clutches
d. Torque converter
d. Torque converter
43
A stall test has been performed and the reading is 700 rpm above specifications. The most likely cause is:
a. Improper test procedures
b. Stator roller clutch not holding
c. Stator roller clutch slipping
d. Transmission clutches slipping
d. Transmission clutches slipping
44
Which of the following should NOT be cleaned in solvent?
a. Friction plates
b. Steel plates
c. Planetary gear sets
d. Thrust washers
a. Friction plates
45
The various pressures present in an automatic transmission can never be greater than:
a. Converter pressure
b. Governor pressure
c. Throttle pressure
d. Mainline pressure
d. Mainline pressure
46
Many automatic transmission problems result from:
a. Improper fluid levels
b. Engine mechanical and tuning conditions
c. Linkage adjustment
d. All of the above
d. All of the above
47
All automatic transmission boost mainline pressure in reverse, manual low or speed and when torque is demanded. This is accomplished by:
a. Applying pressure to the reaction area of the pressure regulator valve
b. Applying throttle pressure to the detent valve
c. Reducing vacuum to the modulator
d. Increasing spring tension on the regulator
a. Applying pressure to the reaction area of the pressure regulator valve
48
Up shifts points are controlled by (blank) pressure.
a. Governor
b. Mainline
c. Converter
d. Detent
a. Governor
49
Low engine vacuum would cause:
a. Late and harsh up shifts
b. Early and harsh up shifts
c. Low mainline oil pressure and early clutch failure
d. Any of the above
a. Late and harsh up shifts
50
The main difference between Type F and Dexron tranmission fluids are:
a. Viscosity
b. Heat dissipation characteristics
c. Co efficient of friction
d. Detergent levels
c. Co efficient of friction
51
Accumulators in the transmission:
a. Are used to cushion the shift
b. Are used to increase line pressure on shift
c. Determine shift points
d. None of the above
a. Are used to cushion the shift
52
Transmission solenoids are:
a. Controlled by the computer
b. Used to increase governor pressure
c. To activate the reverse light circuit
d. To activate the park pawl
a. Controlled by the computer
53
If the transmission fluid is brown rather than red, it would indicate that the:
a. Wrong fluid has been installed
b. Transmission has been operated cold
c. That the fluid is badly burnt
d. That the fluid is old
d. That the fluid is old
54
If you found the transmission fluid was burnt to a black colour it would immediately suggest a problem with:
a. Clutch slippage
b. Broken planetary gears
c. The torque converter
d. Slipping over running clutch
a. Clutch slippage
55
If the transmission has a vacuum modulator, the purpose of the throttle cable would be to:
a. Control converter lock up
b. Control throttle pressure
c. Provide for a forced downshift
d. Offset governor pressure
c. Provide for a forced downshift
56
What occurs in the transmission if the engine RPM "flares up" between shifts:
a. Transmission input spline damaged
b. Line pressure too high
c. Torque converter slippage
d. Clutch slippage
d. Clutch slippage
57
Automatic transmission equipped with factory oil coolers:
a. Only applies to heavy duty application
b. Are always mounted in front of the radiator
c. Always use an air to liquid exchanger
d. Generally use a liquid to liquid exchanger
d. Generally use a liquid to liquid exchanger
58
An automatic transmission does not hold in PARK. Technician A says that misadjusted shift linkage could be the cause. Technician B says that a roller clutch installed backwards could be the cause. Who is correct?
a. A only
b. B only
c. Both A and B
d. Neither A nor B
a. A only
59
A vehicle with an automatic transaxle and a properly turned engine accelerates poorly from a stop. Acceleration is normal above 35 mph. Which of these could be the cause?
a. A worn front pump
b. A bad torque converter
c. A bad governor valve
d. A low fluid level
b. A bad torque converter
60
When the engine is idling, transmission line pressures are low in all selector lever positions. Which of these is the most likely cause?
a. Vacuum diaphragm unit
b. Throttle (modulator) valve
c. Connecting vacuum tubes
d. Transmission pump
d. Transmission pump
61
An automatic transaxle does not shift properly. Which of these should the technician do first?
a. Do a pressure test
b. Adjust the band
c. Check the fluid level
d. Check engine vacuum
c. Check the fluid level
62
An automatic transaxle does not shift properly. Which of these should the technician do first?
a. Check the filter pick up tube seal
b. Check the line pressure
c. Remove and check the valve body
d. Perform an air pressure test
b. Check the line pressure
63
A vehicle with an OBD2 computer system has stored trouble codes. After repairs are completed, the trouble codes should be cleared by:
a. Disconnecting the battery
b. Test driving the vehicle
c. Using scan tool
d. Removing the PCM fuse
c. Using scan tool
64
Too much automatic transmission shaft end play could be caused by any of these EXCEPT a worn:
a. Clutch
b. Selective washer
c. Transmission case
d. Planetary carrier
a. Clutch
65
How is a forward gear reduction obtained from a simple planetary gear set?
a. The sun gear must be held
b. The carrier assembly must be the input member
c. The ring (annulus) gear must be held
d. The carrier assembly must be the output member
d. The carrier assembly must be the output member
66
If a multiple-disc holding clutch in an automatic transmission fails, which of the following statements is true?
a. One member of a planetary gear set will not lock to the output shaft.
b. The input shaft will not lock to the torque converter
c. One member of a planetary gear set will not lock to the transmission case.
d. The output shaft will not lock to the transmission case
c. One member of a planetary gear set will not lock to the transmission case.
67
An automatic transmission has no reverse and no engine braking in manual first gear range. What is the cause of the problem?
a. The overrunning clutch has failed.
b. The forward clutch has burned out.
c. The rear band has broken.
d. The direct clutch is slipping.
c. The rear band has broken.
68
A shift valve in a hydraulically operated automatic transmission fails to open. What is causing this problem?
a. Throttle pressure is greater than governor pressure and spring force combined.
b. Governor pressure is greater than throttle pressure and spring force combined.
c. Mainline pressure has reached or exceeded maximum value.
d. The torque converter has locked up prematurely.
b. Governor pressure is greater than throttle pressure and spring force combined.
69
A torque converter will not cause torque multiplication. What is the problem?
a. The stator is not locking to redirect fluid to the impeller.
b. The stator is locking and redirecting fluid to the impeller.
c. The impeller is being driven at engine speed.
d. The impeller and turbine are being driven at the same speed.
a. The stator is not locking to redirect fluid to the impeller.
70
A vehicle equipped with an automatic transaxle is not shifting correctly. What is the first diagnostic step?
a. Adjust all the bands to specification.
b. Perform a hydraulic pressure test.
c. Inspect and adjust all linkages.
d. Check the fluid level and type.
d. Check the fluid level and type.
71
An electronically controlled automatic transaxle will not upshift to drive second. What should the technician do to repair this problem?
a. Replace the torque converter assembly.
b. Remove the transmission and check for burnt or damaged clutch packs.
c. Remove the valve body and repair the 1-2 shift valve assembly.
d. Follow the correct diagnostic procedure using hydraulic diagrams.
d. Follow the correct diagnostic procedure using hydraulic diagrams.
72
What test procedures should be followed before deciding an automatic transmission needs a major overhaul?
a. Change the transmission fluid and filter, stall test and then pressure test.
b. Stall test, pressure test and then adjust bands and pressures.
c. Check fluid levels, pressure test and then inspect pan deposits.
d. Check fluid levels, inspect pan deposits and then pressure test.
c. Check fluid levels, pressure test and then inspect pan deposits.
73
Which statement is true when repairing automatic transmissions?
a. Clutch packs may be pressure tested using high pressure air.
b. Metal contaminated torque converters may be flushed and re-used.
c. Clutch packs may be pressure tested using low pressure air.
d. Metal contaminated coolers may be flushed and re-used.
c. Clutch packs may be pressure tested using low pressure air.
74
Which statement is true when repairing automatic transmissions?
a. Cooler lines must be flushed before the transmission is removed.
b. Clutch pack clearances must be measured before replacement.
c. Clutch pack plates are lubricated with Vaseline before installing.
d. Cooler lines must be flushed before the transmission is installed.
d. Cooler lines must be flushed before the transmission is installed.
75
A vehicle has a transfer case problem. Which steps should be followed to ensure successful repair of the problem?
a. Verify, isolate, and repair the problem, then verify the repair.
b. Isolate, verify and then repair the problem.
c. Isolate and repair the problem, then verify the repair.
d. Verify and repair the problem, then isolate and verify the repair.
a. Verify, isolate, and repair the problem, then verify the repair.
76
What is the typical maximum pressure drop allowed during shifts?
a. 35 kPa (5 psi)
b. 69 kPa (10 psi)
c. 104 kPa (15 psi)
d. 138 kPa (20 psi)
c. 104 kPa (15 psi)
77
What would dark particles found in the automatic transmission indicate?
a. aeration
b. varnish buildup
c. worn clutch friction discs or bands
d. worn clutch steel disc
c. worn clutch friction discs or bands
78
Which of the following is the most likely cause for a shudder during the engagement of a lock-up torque converter?
a. a bad converter
b. worn or damaged CV or U-joints
c. a worn front planetary gearset
d. a loose flexplate
a. a bad converter
79
When should the ATF level be checked on most vehicles?
a. when the engine is cool
b. when the engine is at operating temperature and the engine is off
c. when the engine is at operating temperature and the engine is on
d. It does not matter
c. when the engine is at operating temperature and the engine is on.
80
How should new friction discs be installed when rebuilding a clutch pack?
a. dry
b. soaked in new automatic transmission fluid
c. coated in petroleum jelly
d. soaked in engine oil
b. soaked in new automatic transmission fluid
81
What would be the most likely cause of a transmission vibration?
a. a worn transmission band
b. an unbalanced torque converter
c. worn oil pump housing
d. burnt clutch discs
b. an unbalanced torque converter
82
How does road testing an electronic automatic transmission vary from road testing a non-electronic transmission?
a. the vehicle should be driven in a normal manner
b. the pressures and gear change condition should be noted
c. a scan tool should be connected to monitor transmission operation
d. the vehicle should be driven in a way to duplicate the complaint
c. a scan tool should be connected to monitor transmission operation
83
What would be the most likely cause of slippage in only one transmission operating gear?
a. a failed clutch pack
b. a faulty governor valve
c. a worn transmission oil pump
d. a failed torque converter stator one-way clutch
a. a failed clutch pack
84
What would higher than specified engine rpm during a stall test indicate?
a. clutches and bands are not releasing
b. the stator one-way clutch will not release
c. the stator one-way clutch will not lock or hold
d. a clutch or band is slipping
d. a clutch or band is slipping
85
Which of the following automatic transmission fluid leaks describe porosity problems?
a. fluid seeping through the transmission case
b. fluid leaks at electrical switches
c. fluid leaks at gasket mating surfaces
d. fluid leaks at the output shaft seal
a. fluid seeping through the transmission case
86
Which of the following could cause a lower-than-specified oil pressure reading during all gears in an electronically controlled automatic transmission under higher loads or engine rpm only?
a. a worn transmission oil pump
b. a sticking electronic pressure control solenoid
c. a faulty vehicle speed sensor
d. a sticking governor valve
b. a sticking electronic pressure control solenoid
87
When should the transmission fluid and filter be changed?
a. at the periodic change interval only with the transmission cold
b. at the periodic change interval only with the transmission at operating temperature
c. whenever oxidation or contamination is present with the transmission cold
d. whenever oxidation or contamination is present with the transmission at operating temperature
d. whenever oxidation or contamination is present with the transmission at operating temperature.
88
What would a low stall speed during a stall test indicate?
a. a slipping stator one-way clutch
b. a slipping clutch pack or band
c. low governor pressure
d. a failed torque converter clutch
a. a slipping stator one-way clutch
89
When conducting a pressure test, what circuit can a 690 kPa (100 psi) gauge be connected to?
a. mainline pressure circuit
b. reverse gear circuit
c. forward gear circuits
d. governor circuit
d. governor circuit
90
What could cause delayed or no upshifts in a non-electronically controlled automatic transmission?
a. low throttle pressure
b. a worn transmission oil pump
c. a faulty vacuum modulator
d. a failed torque converter clutch
c. a faulty vacuum modulator
91
What must occur in a simple planetary gearset to achieve a direct drive?
a. sun gear must be the input member
b. ring gear must be the input member
c. planetary carrier must be the input member
d. two gearset members must be input members
d. two gear set members must be input members
92
What would be the result of holding the planetary carrier of a simple planetary gearset?
a. reverse
b. direct drive
c. fast overdrive
d. forward reduction
a. reverse
93
What allows the stator to operate correctly during vortex and rotary flow?
a. the torque converter clutch
b. an overrunning clutch
c. governor pressure
d. throttle pressure
b. an overrunning clutch
94
What can throttle pressure be used for in automatic transmissions?
a. reduce governor pressure
b. increase governor pressure
c. reduce mainline pressure
d. increase mainline pressure
d. increase mainline pressure
95
What affects shift valves to cause a downshift?
a. governor pressure overcoming throttle pressure
b. engine vacuum pressure overcoming governor pressure
c. throttle pressure overcoming governor pressure
d. vehicle speed overcoming governor pressure
c. throttle pressure overcoming governor pressure
96
What is the drive member of a torque converter?
a. the stator
b. the impeller
c. the turbine
d. the governor
b. the impeller
97
What type of fluid flow is present in the torque converter during maximum torque multiplication?
a. viscous flow
b. vortex flow
c. rotary flow
d. radial flow
b. vortex flow
98
What is necessary for lock-up engagement to take place in a torque converter?
a. The lock-up solenoid check ball must be off its seat and the switch valve held up by the spring tension.
b. The lock-up solenoid must be energized with the check ball on its seat and the switch valve held down by line pressure.
c. The lock-up check ball must be off its seat and the switch valve held down by the line pressure.
d. The solenoid must have the check ball seated and the switch valve held up by spring tension.
b. The lock-up solenoid must be energized with the check ball on its seat and the switch valve held down by line pressure.
99
What component is capable of driving a planetary gearset member in an automatic transmission?
a. a band
b. an overrunning clutch
c. an input shaft-mounted multiple disc clutch
d. a case-mounted multiple disc clutch
c. an input shaft-mounted multiple disc clutch
100
Which of the following is capable of controlling radial loads?
a. Torrington washers
b. nylon thrust washers
c. steel-backed thrust washers
d. bushings
d. bushings
101
What solenoid replaces the conventional throttle valve cable setup in electronically controlled automatic transmissions?
a. electronic pressure control (EPC) solenoid
b. shift solenoid
c. torque converter clutch (TCC) solenoid
d. pulse-width modulated (PWM) solenoid
a. electronic pressure control (EPC) solenoid
102
What makes a compound planetary gearset a Simpson gearset?
a. a common sun gear
b. a common ring gear
c. a common planetary carrier
d. a one-piece front sun gear and rear ring gear assembly
a. a common sun gear
103
What component in an electronically controlled automatic transmission replaces the governor valve?
a. a throttle position sensor (TPS)
b. the manifold absolute pressure sensor (MAP)
c. the vehicle speed sensor (VSS)
d. the transmission fluid temperature sensor (TFT)
c. the vehicle speed sensor (VSS)
104
What torque converter component is responsible for torque multiplication?
a. the impeller
b. the stator
c. the turbine
d. the torque converter lock-up clutch
b. the stator
105
How much ATF is required to raise the level from ADD to FULL when an automatic transmission is at operating temperature?
a. One pint
b. One quart
c. Two quarts
d. One gallon
a. One pint
106
Which of the following would produce an overdrive in a simple planetary gear set?
a. Input sun gear, hold ring gear, output carrier.
b. Input ring gear, hold sun gear, output carrier.
c. Input carrier, hold ring gear, output sun gear.
d. Input sun gear, hold carrier, output ring gear
c. Input carrier, hold ring gear, output sun gear
107
A driver complains that his automatic transmission seems to slip during shifting. The fluid level and condition check out to be normal. Which of the following would be the most likely cause of the condition?
a. Defective shift logic.
b. Fluid aeration.
c. Sticking torque converter stator.
d. Band adjustment.
d. Band adjustment
108
When pressure testing a typical automatic transmission on a road test, what would be the maximum acceptable drop off between shifts?
a. 5 psi (35 kPa)
b. 15 psi (100 kPa)
c. 30 psi (200 kPa)
d. 60 psi (400 kPa)
b. 15 psi (100 kPa)
109
When an automatic transaxle dipstick is wiped on a clean wiper, there is evidence of dark particles. Which of the following would be the most likely cause?
a. Wear debris from the transmission metal components.
b. Severely overheated transmission fluid.
c. Wear debris from clutches and bands
d. Road dust
c. Wear debris from clutches and bands
110
During a 5 second stall test on an automatic transaxle, the engine rpm rises above the manufacturer's specification. Which of the following is indicated?
a. Torque converter stator clutch is slipping.
b. Engine problem
c. Flex plate problem
d. Transmission problem
d. Transmission problem
111
Which of the following is an accurate, dynamic method of testing the operation of electronically controlled automatic transmission solenoid valves?
a. Using a hand held lab scope on a road test.
b. Checking resistance with an ohmmeter.
c. Measuring voltage at the coil.
d. Listening for a clicking noise when actuated.
a. Using an hand held lab scope on a road test.
112
What is the most likely cause of transmission oil that has a milky appearance?
a. Overheating
b. Water contamination caused by missing dipstick
c. Ruptured radiator integral oil cooler
d. Engine oil contamination
c. Ruptured radiator integral oil cooler
113
An electronically controlled automatic transmission is stuck in third gear regardless of gear selector selection position. What is the most likely cause?
a. Transmission is in limp home mode.
b. Transmission oil has completely leaked out.
c. Shifter cable fell off.
d. Air in the valve body.
a. Transmission is in limp home mode.
114
A transmission with a torque converter lock up up solenoid stalls violently when stopping. Which of the following is the most likely cause?
a. Sticking second gear servo.
b. Stuck closed lock up solenoid
c. Engine management problem.
d. Vehicle speed sensor fault.
b. Stuck closed lock up solenoid.
115
A rear wheel drive automatic transmission vehicle has an extremely delayed up shift. Which of the following is the most likely cause?
a. Restricted oil filter.
b. Burned clutches.
c. Defective front pump.
d. Misadjusted linkage.
d. Misadjusted linkage.
116
Which of the following statement is an accurate diagnosis of the results of air testing a servo?
a. A hissing sound indicates that the servo is leaking.
b. There should be no noise coming from the servo or band.
c. A clunking sound indicates a loose band.
d. A steady, clicking noise indicates the valve body check balls are free.
a. A hissing sound indicates that the servo is leaking.
117
Which of the following should be done when inspecting a torque converter?
a. Check its operation by spinning the turbine in the housing.
b. Cut the assembly in half to check the condition of the oil pump drive hub.
c. Make sure the oil pump drive hub and lugs fit loosely in the oil pump.
d. Check the flex plate to converter bolts and threads.
d. Check the flex plate to converter bolts and threads.
118
Whenever the carrier in a planetary gear set is the input, the output will always be:
a. Neutral
b. Reduction
c. Overdrive
d. Reverse
c. Overdrive
