Manual Transmission / Transaxle Flashcards
When an engine is running and the clutch is engaged, what is the friction disc doing?
a. Free wheeling b. Clamped to the flywheel c. Free of pressure plate pressure d. Rotating at transmission output shaft speed
b. Clamped to the flywheel
During a road test, a manual transmission jumps out of gear. Which of the following conditions would be most likely to cause the problem?
a. Oil soaked clutch friction disc b. Improper clutch adjustment c. Weak detent springs d. Worn output shaft bearing
c. Weak detent springs
When a manual clutch is disengaged on a stationary vehicle with the engine running at idle, which of the following should be true?
a. The clutch pressure plate is stationary b. The clutch pilot bearing is stationary c. The clutch friction disc is stationary d. The flywheel is stationary
c. The clutch friction disc is stationary
A driver complains that his clutch drags when disengaged. Which of the following could cause this condition?
a. Glazed friction faces b. Loose flywheel bolts c. Clutch misalignment d. Warped pressure plate
d. Warped pressure plate
What is the function of a pilot shaft when installing a new clutch?
a. Align the transmission with the flywheel housing b. Ensure concentricity of the crankshaft with the bell housing c. Align the friction disc splines with the pilot bearing d. Ensure concentricity of the pressure plate with the flywheel housing
c. Align the friction disc splines with the pilot bearing
Extreme wear is observed on a transmission input shaft sleeve. Which of the following should be done to correct the problem?
a. Replace the transmission b. Use a repair sleeve and accommodating release bearing c. Repair wear marks and weld and refinish with crocus cloth d. Install a new release bearing only
b. Use a repair sleeve and accommodating release bearing
Which of the following would be the most likely cause of poor clutch release?
a. Worn clutch fork b. Noisy release bearing c. Air in the slave cylinder d. Worn friction disc
c. Air in the slave cylinder
Which of the following is the most common cause of gear clash when is occurs in gear ratios?
a. Defective synchronizer b. Dragging clutch c. Slipping clutch d. Damaged countershaft gear
b. Dragging clutch
After pilot bearing installation, what should it be lubricated with?
a. Plenty of wheel bearing grease b. A small amount of lithium grease c. A small amount of high temperature grease d. Dielectric compound
c. A small amount of high temperature grease
Which of the following is most likely caused by low lubricant levels in a manual transmission or transaxle?
a. Gear clashing b. Hard shifting c. Gear seizure or lock up d. Jumping out of gear
c. Gear seizure or lock up
When a transaxle is in neutral with engine running, a growling noise is heard. If the vehicle is in motion and the clutch is engaged, where is the problem most likely to be?
a. Transaxle input shaft bearings b. Intermediate shaft bearings c. First / Second synchronizer assembly d. Pinion and ring gear mesh
a. Transaxle input shaft bearings
A rear wheel drive transmission has a bearing rumble in all gears except in direct drive. The most likely bearing to be defective is:
a. Input shaft ball bearing b. Release bearing c. Pilot bearing d. Both B and C
a. Input shaft ball bearing
A noise is present when the engine is at idle, in neutral, and the clutch is engaged. The most probable cause is:
a. Input shaft ball bearing b. Output shaft bearing c. Pilot bearing d. Output shaft ball bearing
a. Input shaft ball bearing
A noise is only present when your foot is resting on the clutch pedal. The most probable cause is:
a. Input shaft ball bearing b. Pilot bearing c. Release bearing d. Counter shaft needle rollers
c. Release bearing
A noise is heard at engine speed with the clutch disengaged. What is the most likely cause?
a. Input shaft ball bearing b. Pilot bearing c. Release bearing d. Countershaft needle rollers
b. Pilot bearing
The transmission grinds into reverse after the clutch pedal is depressed, the probable cause is:
a. Reverse gear synchronizer is worn b. Reverse idler gear is worn c. Incorrect clutch free-play adjustment d. Reverse shaft brake is worn out
c. Incorrect clutch free-play adjustment
Transmission “pops out” of second gear only when decelerating. The most likely cause is:
a. 2nd speed gear b. 1-2 synchronizer sleeve c. 2nd speed synchronizer ring d. Both A and B
d. Both A and B?
While attempting to down shift into second gear, the attempted shift fails and a “grinding” noise is heard. The most likely cause is:
a. Clutch disengagement problems b. 1-2 synchronizer hub c. 2nd speed synchronizer ring d. All of the above
d. All of the above
While attempting to shift into second gear, the drive wheels lock up solid when the clutch is released. the most probable cause is:
a. The detent ball is broken b. Second gear synchronizer is worn c. Second gear hub is cracked d. Interlock pin is sheared
d. Interlock pin is sheared?
A RWD transmission is leaking out of the front input shaft and output shaft seal. You should replace the seals and:
a. Overhaul the transmission b. Use different transmission fluid c. Check and clean the transmission vent d. Check the output shaft for wear on the sealing surface
c. Check and clean the transmission vent
The most likely cause of a transmission that is hard to engage into all gears is:
a. Both synchronizer hub seized on the main shaft b. Clutch pedal height is incorrect c. Main shaft to counter gear backlash is too great d. All of the above
b. Clutch pedal height is incorrect
To provide soft clutch engagement and some sensitivity to the pedal “feel”, the clutch disc design incorporates:
a. Cushioning Marcel springs b. Torque springs c. Friction ring d. Drive wash
a. Cushioning Marcel springs
One way to design a pressure plate assembly that will increase clutch holding pressure without the use of additional springs is to:
a. Use a thinner clutch disc b. Use more release lever c. Add centrifugal weights to the release levers d. Add centrifugal weights to the driving lugs
c. Add centrifugal weights to the release levers
The purpose of torque springs in a clutch disc is to:
a. Use a thinner clutch disc b. Use more release levers c. Add centrifugal weights to the release levers d. Add centrifugal weights to the driving lugs
a. Use a thinner clutch disc
When installing the transmission, you must be careful not to:
a. Lubricate the clutch pilot bearing b. Install the release bearing first c. Fill the transmission with oil d. Allow the transmission to hang by the input shaft
d. Allow the transmission to hang by the input shaft
If the clutch release levers are uneven, the clutch will:
a. Fail to disengage properly b. Slip c. Chatter or graph d. Both A and B
d. Both A and B
A vehicle’s clutch is found to be slipping. Before removal, one important item to check is:
a. Clutch pedal free play b. Engine mounts c. Bell crank and cross shaft d. Flywheel housing
a. Clutch pedal free play
Causes of clutch disengagement problems include warped pressure plate, misadjusted clutch linkage, hydraulic clutch problems and:
a. Motor mounts on a linkage type system b. Bent clutch disc hub c. Worn pilot bushing d. All of the above
d. All of the above
A clutch has problems disengaging and is chattering. Possible causes include:
a. Heat damaged pressure plate b. Disc worn down to rivets c. Leaking slave cylinder d. None of the above
a. Heat damaged pressure plate?
As the clutch disc wears normally, the clutch pedal free play will:
a. Decrease b. Increase c. Stay the same d. Vary continuously
a. Decrease
Flywheel runout problems can cause:
a. Clutch pedal vibration b. Clutch chatter c. Disengagement problems d. All of the above
d. All of the above
When a gear with 12 teeth is used to drive a gear with 30 teeth, the gear ratio is?
a. 0.4:1 b. 2.5:1 c. 12:3 d. 30:1
b. 2.5:1
Which statement is NEVER true of two gears in mesh?
a. Input and output torque are constant b. Input and output speed are constant c. Power can be transferred around a corner d. Driver and driven gear direction of rotation are the same
d. Driver and driven gear direction of rotation are the same
To bring a gear’s speed to the same speed as that of the gear it is to be meshed with, transmissions use a:
a. Brake b. Synchronizer c. Slip clutch d. Shift collar
b. Synchronizer
An idler gear placed between the input and output gears changes:
a. The output direction of rotation and gear ratio b. The gear ratio but not the output direction of rotation c. Just the gear ratio d. Just the output direction of rotation
d. Just the output direction of rotation
The mechanism in a transmission that prevents shifting into two gears simultaneously is the:
a. Detent b. Shift rails c. Interlock d. Shift fork
c. Interlock
An overdrive transmission allows the engine to:
a. Provide greater torque b. Run at higher rpm and maintains cruising speed c. Run at lower rpm and maintains cruising speed d. Operate at a reduced load
c.Run at lower rpm and maintains cruising speed
A typical gear ratio of an overdrive is:
a. 0.75:1.0 b. 1.0:0.85 c. 2.0:1.0 d. 3.0:1.0
a. 0.75:1
Before a transmission is diagnosed for a hard shifting complaint, check the:
a. Universal joints b. Clutch operation c. Drive pinion angle d. Gear shift lever
b. Clutch operation
The synchronizer ring stops the transmission from popping out of gear.
a. True b. False
b.False
The component in the transmission that stops gear clash is the:
a. Input shaft b. Sleeve c. Hub d. Synchronizer ring
d. Synchronizer ring
A manual transmission slips out of high gear. What is the most likely cause:
a. Worn blocking rings b. Too much main shaft end play c. Broken synchronizer keys d. Worn shifter interlocks
b. Too much main shaft end play
In a vehicle with a single plate clutch, loss of free pedal can be caused by a:
a. Worn release bearing b. Broken clutch linkage c. Worn clutch linkage d. Weak pressure plate springs
c. Worn clutch linkage
A four speed, fully synchronized transmission has a clunking or knocking noise in first and reverse only. Tech A says that a broken tooth on the clutch (input) gear could be the cause. Tech B says that a broken tooth on the counter (cluster) gear could be the cause. Who is correct?
a. A only b. B only c. Both A and B d. Neither A nor B
b. B only
A manual transaxle makes a clunking noise on acceleration and on deceleration. Tech A says that a loose differential case pinion shaft could be the cause. Tech B says that worn CV joints could be the cause. Who is correct?
a. A only b. B only c. Both A and B d. Neither A nor B
c. Both A and B
The clutch does not release fully when the pedal is pushed to the floor. Any of these could be the cause EXCEPT:
a. Weak pressure plate springs b. Too much free pedal travel c. A warped clutch disc d. A seized pilot bearing
a. Weak pressure plate springs
