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140 Cards in this Set
- Front
- Back
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Clutch chatter may be caused by...
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Weak clutch plate torsional springs
Weak clutch plate torsional springs cause clutch chatter, but a worn clutch release bearing, pilot bearing, or excessive input shaft end play does not result in this problem. |
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Lack of clutch pedal free play may cause
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Clutch slipping
When there is excessive free play, the Clutch is not released when the clutch pedal is fully depressed, resulting in clutch dragging and hard shifting. If there is no clutch pedal free play, the clutch release bearing maintains pressure on the pressure plate so the clutch is not fully applied. This action results in clutch slipping. |
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A clutch with a self adjusting cable has a (...) release bearing
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constant running release
Many self adjusting clutch cables have no free play, no over center spring, and a constant running release bearing. |
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a hydraulic clutch failing to disengage properly when the clutch pedal is fully depressed may be due to
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Air in the system
If the clutch pedal free play is less than specified, the clutch may not be fully engaged with the pedal released. Therefore, A is wrong. Worn clutch facings, or a scored pressure plate may cause a slipping clutch, but these prob- lems will not cause improper clutch disengagement. Therefore, C and D are wrong. lf there is air in the clutch hydraulic system, the slave cylinder may not push the clutch release lever enough to dìsengage the clutch. Thus, B is right. |
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T/F
on a clutch with an adjustable linkage, the clutch pedal free play adjustment sets the distance between the release bearing and the pressure plate fingers. |
True
The clutch pedal adiustment sets the distance between the release bearing and the pressure plate fingers. |
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T/F
on a clutch with an adjustable linkage, a worn release bearing is noisy with the clutch pedal released |
False
A worn release bearing is noisy with the Clutch pedal depressed because the release bearing is in Contact with the pressure plate. |
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Clutch chatter may be caused by...
excessive crank end play? loose engine bearings? a scored pressure plate? improper pressure plate to flywheel position? |
A scored pressure plate may Cause Clutch Chatter.
Excessive crankshaft end play causes the pressure plate to move away from the clutch release bearing, which may result in improper clutch release. Loose engine main bearings may Cause an oil leak at the rear main bearing, which Contaminates the clutch facings with oil, resulting in Clutch slipping. Improper pressure plate to flywheel position causes engine vibrations. |
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The distance from the rivet heads in the clutch facings surface should be at least...
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.012 in.
Clutch slipping may occur if the rivet heads are 0.012 in. or less below the facing surface. |
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A worn pilot bearing may cause a rattling, growling noise while...
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the engine is idling and the clutch pedal is fully depressed
When the Clutch pedal is released, the Clutch plate is held firmly between the flywheel and pressure plate. Under this Condition the input shaft Cannot rattle in a worn pilot bearing. A worn pilot bearing Causes a rattling noise at low speed with the Clutch pedal depressed because the Clutch plate and input shaft are free to move between the pressure plate and the flywheel. |
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T/F
If too much material is removed during flywheel resurfacing the torsion springs on the clutch disc may contact the flywheel bolts, resulting in noise while engaging and disengaging |
True
lf excessive material is removed from the flywheel the torsion springs on the clutch plate are moved closer to the flywheel, and these springs may contact the flywheel. |
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T/F
if excessive material is removed from the flywheel during resurfacing, the slave cylinder may not have enough travel to release the clutch properly. |
True
Removing excessive material from the flywheel moves the pressure plate forward away from the release bear- ing. This action increases free play so the slave cylinder rod may not move far enough to release the clutch. |
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Excessive misalignment between the bell housing and the engine block may cause...
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A growling noise when the clutch pedal is depressed
Misalignment between the bell housing and the engine block may cause Clutch Chatter because the Clutch disc mounted on the input shaft is not aligned properly with the pres-sure plate and flywheel. |
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T/F
Shims may be installed between the bell housing and the engine block mating surfaces to correct bell housing face runout. |
True
Shims may be placed between the bell housing and the engine block to Correct bell housing face runout. |
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t/F
Excessive bell housing face runout may be caused by overheated clutch disc facings |
False
Overheated Clutch facings would not result in bell housing face runout. |
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To correct excessive bell housing bore alignment runout, you should...
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Bell housing bore misalignment may be corrected by turning eccentric dowels in the engine
block to the bell housing mounting surface, |
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T/F
The dial indicator is positioned in the same way to measure crankshaft end play and flywheel runout |
True
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T/F
Sagged transmission mounts may cause improper drive shaft angles on RWD vehicles |
True
Sagged engine mounts cause improper drive shaft angles in a rear-wheel-drive car. |
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T/F
Improper drive shaft angles may cause a vibration that is constant when the vehicle is accelerated and decelerated |
False
A drive shaft vibration changes with acceleration and deceleration. |
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T/F
Excessive end play between the second speed gear and its matching synchro may cause it to jump out of second gear |
True
Excessive second gear end play may cause the transmission to jump out of second gear. |
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T/F
Week detent springs on the shift rail may cause a vehicle to jump out of second gear |
True
weak detent spring on the second gear shift fork may cause the transmission to jump out of second gear. |
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The shift lever adjustment is usually performed with the transmission in what gear?
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neutral
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Repeated extension housing seal failure is most likely caused by ...
a scored drive shaft yoke? excessive output shaft end play? excessive input shaft end play? a worn output shaft bearing? |
A scored drive shaft yoke results in excessive extension housing seal wear.
Excessive output shaft, or input shaft, end play results in lateral shaft movement that would not adversely affect the seal. A worn output shaft bearing would not Cause premature extension housing seal failure. Therefore, B, C, and D are wrong. |
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T/F
If the synchro sleeve doesn't slide smoothly over the blocker ring and gear teeth, hard shifting will occur |
True
A synchronizer hub that does not slide smoothly over the blocking ring causes the hub to jam, resulting in hard shifting, |
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T/F
The synchro hub and sleeve must be marked in relation to each other prior to disassembly |
True
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A bent shift rail may cause...
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Hard shifting may be caused by a bent shift rail
A bent shift rail would not cause the transmission to jump out of gear, or result in gear clash or noise. |
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A manual transmission has a growling noise with the engine idling and the clutch pedal released in neutral. the noise disappears when the clutch pedal is depressed and when the tranny is placed in gear. the cause may be...
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faulty input shaft roller bearing
Because the input is only turning with the clutch released, a rough input shaft roller bearing or needle bearings would result in a growling noise under this condition. |
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The threads in the cone of the blocking rings should be...
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Sharp
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T/F
The dog teeth tips on the blocking rings should be Flat with smooth surfaces |
False
The blocking ring dog teeth tips should be pointed with smooth surfaces. |
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Clearance between the blocking ring is important for...
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Clearance between the blocking ring and matching gear dog teeth is important for proper shifting,
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The synchro sleeve should slide...on the hub.
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and the synchronizer sleeve must slide freely on the hub
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If the clearance between the blocking ring and the dog teeth is less than spec...
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specified, the blocking ring is worn, which results in hard shifting. This problem would not result in noise while driving in that gear.
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T/F
If the counter gear shaft and needle bearings are pitted and scored, the transmission may have a growling noise with the engine idling in neutral and the clutch pedal released |
True
Because the counter gear is turning with the clutch pedal released in neutral, damaged counter gear bearings cause a growling noise |
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T/F
If the counter gear shaft and needle bearings are pitted and scored, The transmission may have a growling noise while traveling in any gear |
True
Because the counter gear is turning with the clutch pedal released in any gear, damaged counter gear bearings cause a growling noise |
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T/F
A manual transmission has a clunking noise during acceleration and deceleration, The main shaft may have excessive end play |
True
Excessive main shaft end play may cause a clunking noise during acceleration and deceleration. |
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T/F
A manual transmission has a clunking noise during acceleration and deceleration, the clutch facings and pressure plate friction surface may be worn |
False
Worn clutch facings and pressure plate friction surface may cause clutch slipping, but this problem does not cause a clunking noise during acceleration and deceleration. |
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Premature wear on the extension housing bushing may be caused by..
worn speedo drive and driven gear? metal burrs on the rear tranny mating surface plugged tranny vent opening? excessive tranny main shaft end play? |
Metal buns between the extension housing and the transmission case cause misalignment
of the extension housing, which forces the extension housing bushing against the drive yoke in one location, resulting in bushing wear. |
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T/F
Erratic speedo operation may be caused by |
A worn adapter bushing and speed distance sensor allows the speedometer cable to jump around causing erratic speedometer operation.
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A fully synchronized four speed manual tranny has gear clash in all forward gears and reverse. the cause could be..
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A clutch disc sticking on the input shaft would cause the clutch not to release properly, resulting in gear clash in all gears.
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T/F
An improper shift linkage adjustment may cause hard transaxle shifting |
true
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T/F
improper shift linkage adjustment may result in the tranny sticking in gear |
True
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T/F
Repeated transaxle drive axle seal leakage and replacement may be caused by a plugged transaxle vent |
True
A plugged transaxle vent may cause excessive transaxle pressure and repeated drive axle seal failure. |
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T/F
Repeated transaxle drive axle seal leakage and replacement may be caused by a worn outer drive axle joint |
False
A worn outer drive axle joint may cause a clicking noise while cornering at low speed, but this problem would not cause repeated drive axle seal failure. |
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t/f
a misaligned engine and transaxle cradle may cause drive axle vibrations |
true
A misaligned engine and transaxle cradle may cause drive axle Vibrations. |
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t/f
a misaligned engine and transaxle cradle may cause improper front suspension angles |
True
because the lower control arms are connected to this cradle, misalignment of the cradle may cause improper front suspension angles. |
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T/F
The input and output shafts must be removed before the differential during transaxle dissasembly |
False
After the case halves are separated, the differential may be removed first on some transaxles. |
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T/F
A week shift rail detent spring on the 3-4 shift rail may cause a four speed tranny to jump out of 3rd gear |
True
A weak detent spring on the 3 - 4 shift rail may cause the transaxle to jump out of third gear, |
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T/F
Excessive wear on the 4th speed gear dog teeth may cause a four speed tranny to jump out of 3rd gear |
False
Worn dog teeth on the fourth-speed gear would not cause the transaxle to jump out of third gear. |
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The second speed gear dog teeth and blocking ring teeth are badly worn, this may cause...
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Worn dog teeth on the second speed gear and blocking ring may cause the transaxle to jump out of second gear.
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T/F
synchro hubs are reversible on the shaft on which they are mounted |
False
Synchronizer hubs are not reversible on the shaft, |
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T/F
synchro sleeves are reversible on their matching hub |
False
synchronìzer sleeves are not reversible on their hub. |
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T/F
A transaxle shifts normally into all forward gears, but won't shift into reverse, the reverse shifter fork may be brokern |
True
A broken reverse shifter fork may cause failure of the transmission to shift into reverse without any noise. |
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T/F
A transaxle shifts normally into all forward gears, but won't shift into reverse, the reverse idler gear teeth may be worn |
False
Worn reverse idler teeth may cause a growling noise while driving in reverse, but this problem would not cause failure to shift into reverse. |
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T/F
an epoxy based sealer may be used to repair a crack in some transaxle cases |
An epoxy based sealer may be used for some transaxle use cracks.
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In some transaxle case the speedometer drive gear is mounted in..
the input shaft the transfer gear the diff case the drive axle inner hub |
In some transaxles the speedometer dxive gear is mounted on the Diff case
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T/F
the reverse lockout system is activated by a signal from the neutral position switch |
False
The PCM uses the VSS signal to operate the reverse lockout system, |
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T/F
the reverse lockout system prevents the driver from shifting into reverse at vehicle speeds above 3 mph |
False
The reverse lockout system prevents the driver from shifting into reverse at speeds above 16 mph. |
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T/F
Worn and chipped ring and pinion teeeth may cause a manual transaxle to chatter while driving straight ahead |
False
Damaged ring gear teeth would cause a clicking noise while the vehicle is in motion, This problem would nor cause differential chatter |
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T/F
Improper preload on the differential components may cause a manual transaxle to chatter while driving straight ahead |
True
improper preload on components, such as side bearings, may differential chatter |
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T/F
While determining the proper differential side gear thrust washer thickness, the side gear end play must be measured individually on each side gear with the thrust washers behind the gears. |
False
The side gear end play must be measured individually on each side gear with the thrust washers removed. |
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T/F
While determining the proper differential side gear thrust washer thickness, The correct thickness of the side gear thrust washer provides the specified side gear endplay |
True
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T/F
While determining the proper differential side gear thrust washer thickness, The correct thickness of the side gear thrust washer provides the specified side gear preload |
False
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T/F
a preload adjustment shim is positioned between both differential bearings and the differential case |
False
A side bearing preload adjustment shim is positioned behind one of the side bearing cups, |
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T/F
one of the differential bearings must be removed before the speedo drive gear |
False
The speedometer drive gear will slide over the side bearing so the bearing does not have to be removed first. |
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T/F
In some transaxles selective shims are positioned behind the tapered roller bearings on the input and output shafts |
False
The selective shims are positioned behind the outer bearing races in the case to obtain the proper preload on the input and output shafts |
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T/F
In some transaxles selective shims are positioned behind the outer bearing races on the input and output shafts to obtain the correct preload. |
True
The selective shims are positioned behind the outer bearing races in the case to obtain the proper preload on the input and output shafts |
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T/F
If the needle bearings between the output shaft and the output shaft gears are scored and blue from overheating, the transaxle may have been filled with the wrong lubricant |
True
Wrong transaxle lubricant may burned output shaft bearings. |
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T/F
If the needle bearings between the output shaft and the output shaft gears are scored and blue from overheating, the projection may be broken off on the oil feeder behind the front output shaft bearing |
A broken oil feeder behind the front output shaft baring results in improper output shaft bearing lubrication and burned bearings.
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T/F
A worn drive shaft u-joint may cause a squeaking noise that decreases in relation to vehicle acceleration |
False
A worn U joint may cause a squeaking noise that increases in relation to vehicle acceleration, |
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T/F
A heavy vibration that only occurs during acceleration may be caused by a worn centering ball and socket on a double cardan u-joint. |
True
If the centering ball and socket is worn in a double Cardan U joint, a heavy vibration may occur during acceleration |
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T/F
A front wheel drive car has a clunking noise while decelerating, This may be caused by a worn inner drive axle joint |
True,
A clunking nose while decelerating may be caused by a worn inner drive axle joint. |
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T/F
A front wheel drive car has a clunking noise while decelerating, This may be caused by a worn front wheel bearing |
False,
A worn front wheel bearing usually results in a growling noise while cornering or driving straight ahead |
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T/F
The dial indicator should be positioned near the front of the drive shaft to measure drive shaft runout |
false
While measuring drive shaft run out, the dial indicator must be positioned near the center of the drive shaft, |
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T/F
if the drive shaft run out is excessive, the drives haft may be straightened in a hydraulic press. |
False,
the drive shaft must be replaced |
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T/F
On a RWD vehicle that has a vibration that increases in relation to vehicle speed, the balance pad may have fallen off the drive shaft |
true
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T/F
On a RWD vehicle that has a vibration that increases in relation to vehicle speed, some of the wheels may be out of balance |
True
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After servicing the rear heel bearings on a FWD car, the bearing adjustment nut is tightened to 20 ft-lb and loosened one half turn, the next step is to...
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Tighten the adjusting nut to 10 to 15 in. lbs
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T/F
While driving a vehicle straight ahead, the diff produces a whining noise, the diff side gears may be damaged |
True
Because the side gears are only turning while cornering, they do not cause a whining noise while driving straight ahead. |
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T/F
While driving a vehicle straight ahead, the diff produces a whining noise, the ring and pinion adjustments may be incorrect |
True,
improper ring gear and pinion gear adjustments may this problem. |
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T/F
insufficient pinion nut torque may cause a clunking noise during acceleration or deceleration |
True
A loose pinion nut allows pinion shaft end play, resulting in a clunking noise on acceleration and deceleration. |
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T/F
insufficient pinion nut torque may cause a growling noise with the vehicle in motion |
False
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Excessive ring gear runout may be caused by excessive...
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diff case runout may cause excessive ring gear runout
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T/F
Hunting type ring and pinion gear sets must be timed. |
False,
hunting ring and pinion gear sets do not require timing |
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T/F
Loose ring gear bolts may cause gear chuckle or knocking noise while the vehicle is in motion |
true
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T/F
Damaged ring gear and pinion gear teeth may cause a ticking noise while driving |
True
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T/F
the grooved painted tooth on the pinion gear must be meshed with the painted notched ring gear teeth on some gear sets |
True
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T/F
The marking on the pinion must be added to the shim thickness to determine the correct pinion depth shim thickness |
True.
A pinion marked +3 and a light drag with a shim of .063 will require a .066 in. shim |
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When obtaining the "nominal pinion depth shim thickness" the reading on the dial indicator must be...
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Subtracted from 0.100 in.
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T/F
the pinion bearings should be lubricated when the pinion turning torque is measured |
True
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T/F
The pinion nut may be loosened to obtain the specified turning torque. |
False
The pinion nut must never be loosened to obtain the specified pinion turning torque, |
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T/F
If the ring tooth contact pattern indicates pinion tooth contact on the toe of the pinion gear, the pinion gear should be moved toward the ring gear |
False
The pinion should be moved away |
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T/F
If the pinion gear teeth have low flank contact on the ring gear teeth the pinion gear should be moved toward the ring gear |
False
the pinion should be moved away |
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T/F
With a RWD Diff that vibrates only while turning a corner, the pinion bearings may be worn and the pinion bearing preload is less than spec |
False,
Worn pinion bearings may cause a growling noise while driving straight ahead. |
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T/F
With a RWD Diff that vibrates only while turning a corner, the bearing surfaces between the side gears or bevel pinions and the diff case may be damaged |
true
because the side gears and bevel pinions rotate only while turning a corner, rough bearing surfaces on these gears and the diff case may cause a vibration while cornering |
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T/F
the ring gear run out should be measured before removal o f the case and ring gear assembly |
True
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T/F
The case side play should be measured before removal of the case and ring gear assembly |
True
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The side bearing caps should be marked in relation to the housing before removal of the case and ring gear assembly
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True
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T/F
The side bearings should be clean and dry before installation of the case and ring gear assembly |
False
The side bearings should be lubricated before installation. |
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T/F
An accurate diff case run out measurement may be performed with scored side bearings |
false
Side bearings must be in good condition |
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T/F
the ring gear run out should be measured before the case run out. |
True
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T/F
LSD: Friction plates are splined to the rear axle hub. |
False
the friction plates are splined to the clutch hub |
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t/F
LSD: steel plates are splined to the diff case |
True
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T/F
LSD: each clutch set contains a preload spring |
True
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t/F
LSD: a special lube is required |
True
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T/F
A LSD chatters while cornering, the diff may be filled with the wrong lubricant |
true
Wrong lubricant, or worn friction and steel plates, in a limited slip differential may cause chattering while cornering, |
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T/F
A LSD chatters while cornering, friction and steel plates may be worn and burned |
true
Wrong lubricant, or worn friction and steel plates, in a limited slip differential may cause chattering while cornering, |
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T/F
an axle shaft with excessive runout may cause a vibration while driving at a constant speed of 60 mph |
true
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t/F
An axle shaft with excessive runout may cause a vibration while accelerating at low speed. |
False
Not at "low speed" |
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T/F
Rear axle shaft and bearing service: The retainer should be loosened by striking it with a hammer and chisel |
True
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T/F
Rear axle shaft and bearing service: The bearing should be pressed off the shaft with a hydraulic press |
True
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T/F
Rear axle shaft and bearing service: after the bearing is pressed of the axle, the bearing may be reused |
False
The baring must be replaced after it is pressed oft the axle. |
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T/F
Rear axle shaft and bearing service: press the bearing and retainer onto the axle with a hydraulic press |
True
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Excessive axle flange runout may be caused by...
a worn axle c-lock? a bent axle shaft? a bent diff housing? A worn rear axle bearing? |
A bent axle shaft
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T/F
on a 4wd vehicle with a vibration that is more noticeable while cornering, the U joints may be worn |
False
U joints may cause a squeaking or clunking noise and a vibration while driving straight ahead. |
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T/F
on a 4wd vehicle with a vibration that is more noticeable while cornering, the outboard front axle joints may be worn. |
True
Worn outer front drive axle joints on a 4wd may cause a vibration whle cornering. |
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T/F
A vacuum shifted 4wd system does not shift into 4wd. The engine vacuum may be low. |
True,
low engine vacuum may cause this problem |
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T/F
A vacuum shifted 4wd system does not shift into 4wd, the vacuum motor at the front axle may be the problem |
True,
The vacuum motor at the front diff may cause this problem |
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T/F
Transfer case removal: if the vehicle has a torsion bar front suspension, the torsion bars and rear torsion bar support may have to be remoed prior to transfer case removal. |
True
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T/F
Transfer case removal: The transfer case lubricant should be drained after the transfer case is removed from the vehicle |
False
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T/F
Transfer case: the oil pump may be driven by the output shaft |
True
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T/F
Transfer case: excessive amounts of silicone sealant on the case halves may plug the oil pickup screen. |
True
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T/F
Transfer case: compressed air should be used to blow out all lubricant passages |
True
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T/F
Transfer case: transfer case shifting is not affected by the use of an improper transfer case fluid |
False
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T/F
Transfer case: in 4wd low, the power flow in the transfer case is from the input shaft through the sun gear and planetary carrier to provide gear reduction. |
True
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T/F
Transfer case: in 4wd low the annulus gear in the planetary gear is rotating counter clockwise. |
false
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T/F
worn u-joints may cause a vibration on a 4wd vehicle that is more noticeable when changing the throttle position. |
True
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T/F
Worn front drive axle joints may cause a vibration on a 4wd vehicle that is more noticeable when changing the throttle position. |
true
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T/F
incorrect drive shaft angles may cause a vibration on a 4wd vehicle that is more noticeable when changing the throttle position. |
True
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T/F
worn drive shaft slip joints may cause a vibration on a 4wd vehicle that is more noticeable when changing the throttle position. |
False
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T/F
4wd front drive axles: the inner tripod joint is held on the axle shaft with a snap ring |
True
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T/F
4wd front drive axles: a special swaging tool may be required to tighten the outer boot clamps |
True
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T/F
4wd front drive axles: coat the new joint with grease supplied with the joint and discard the remaining grease |
False
All of the grease should be used |
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vworn outer cv joints may cause a clicking noise while cornering.
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True
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T/F
Front wheel bearings: automatic locking hubs should be packed with grease |
False
do not pack with grease |
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T/F
Front wheel bearings: the cap on automatic locking hubs should be packed with grease |
False
do not pack with grease |
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T/F
Transfer case: a plugged transfer case vent may cause seal leakage |
true
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T/F
Transfer case: the remote transfer case vent helps to prevent moisture from entering the transfer case when driving through water |
true,
because its remote |
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In an electronically shifted transfer case, the shift motor is operated by...
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the generic electronic module
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T/F
electronically shifted transfer case, coupled to an automatic transmission: the transfer case will shift into 4L at any speed |
False,
speed must be less than 3mph |
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T/F
electronically shifted transfer case, coupled to an automatic transmission: the transfer case will shift into 4L with the transmission in any gear |
False
It must be in neutral |
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When an auto 4wd transfer case is operating in A4WD and the front drive shaft begins to turn faster than the rear drive shaft...
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The computer increases the clutch coil duty cycle
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