ASE ASE Manual Drive Train and Axles 3

Question 1

A FWD vehicle makes a loud clunking noise during acceleration from a stop but not at steady speed. What drivetrain component is MOST likely at fault?

Accepted Answer

Worn or loose inner CV joint

Answer

Worn outer CV joint

Answer

Faulty wheel bearing

Answer

Worn transmission mount causing driveline lash

Question 2

When replacing a CV axle shaft, the technician notices the new boot clamp must be installed in a specific orientation. Why?

Accepted Answer

The clamp must face away from the rotation direction so the lip does not catch and peel back

Answer

The orientation only affects aesthetics, not function

Answer

The clamp must face the wheel bearing for proper heat dissipation

Answer

Orientation does not matter on modern clamps

Question 3

A 4WD vehicle with a transfer case makes a grinding noise only when in 4WD high or low but operates quietly in 2WD. What is the MOST likely cause?

Accepted Answer

Worn or damaged transfer case chain or planetary gears

Answer

Worn front differential pinion bearings

Answer

Low rear differential fluid

Answer

Faulty rear driveshaft U-joint

Question 4

A manual transmission pops out of 3rd gear under load. What is the MOST likely cause?

Accepted Answer

Worn or damaged 3rd gear synchronizer hub or detent mechanism

Answer

Low transmission fluid

Answer

Loose shift linkage bracket

Answer

Worn clutch pressure plate

Question 5

What is the purpose of checking driveshaft runout and balance?

Accepted Answer

To diagnose vibration caused by a bent or out-of-balance shaft

Answer

To verify the U-joint cross and bearing cap condition only

Answer

To measure pinion bearing preload

Answer

To set ring gear backlash

Question 6

Technician A says U-joint phasing refers to the alignment of the front and rear U-joint yokes on a driveshaft. Technician B says incorrect phasing can cause a second-order driveline vibration. Who is correct?

Accepted Answer

Both Technician A and B

Answer

Technician A only

Answer

Technician B only

Answer

Neither Technician A nor B