Drivetrain Systems Flashcards

(18 cards)

1
Q

The transmission shifts hard, the input bearing is noisy and the unit has had repeated clutch failures. What would be the cause of this problem?

A

Clutch housing allignment

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2
Q

What will cause an automatic transmission retarder to have poor braking performance and produce excessive heat?

A

The torque convertor lock-up clutch is slipping.

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3
Q

Which of the following would cause the engine speed at converter stall to be higher than specification?

A

The stator was not held stationary during the stall.

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4
Q

What would cause vibration, a hard “clunk” over uneven ground, and the driveshaft to be out of phase?

A

Twisted driveshaft due to severe shockloads

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5
Q

What would cause one u-joint to wear out repeatedly with signs of brinelling?

A

Insufficient driveline angle

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6
Q

What would cause a hydraulically controlled automatic transmission to shift from first to second too soon, while all the other shift points are normal?

A

Spring tension at the 1-2 shift signal valve too low

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7
Q

How should throttle position changes affect shifting in a hydraulically controlled automatic transmission?

A

Full or heavy throttle operation should cause the transmission to downshift at higher speed

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8
Q

What would cause a high temperature reading on the input pinion of a rear axle after overhaul?

A

Excessive pinion bearing preload.

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9
Q

What would cause a heavy heel pattern on a hypoid gear set?

A

Backlash is excessive

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10
Q

What would cause the right side tandem housing to tip in toward the top of the grader frame?

A

Worn pivot bushings

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11
Q

Which procedure should be performed when replacing a clutch?

A

Check bell housing allignment before installing clutch assembly

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12
Q

During a convertor/transmission repair, how is a torque convertor checked for leakage?

A

Pressureize converter with specific air pressure

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13
Q

What is the final procedure when installing a torque converter on a transmission?

A

Engage pump impeller with the shaft

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14
Q

What should be done if a universal joint bearing cup fails to purge?

A

Release seal tension, then apply grease

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15
Q

Which procedure should be used to test a powershift transmission which has low driving force in 3rd forward and 3rd reverse?

A

Verify complaint, then pressure test the speed clutch assembly

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16
Q

To adjust bearing endplay on a transfer case, what steps would the technician follow?

A

Measure endplay with a dial indicator, calculate shim pack

17
Q

What needs to be done to correct a ring and pinion gear pattern which has excessive flank contact?

A

Move pinion out

18
Q

What is the final step when assembling a single-reduction carrier assembly?

A

Set the thrust screw to high spot of bevel gear