ASE ASE Automatic Transmission and Transaxle

Question 1

A vehicle with an automatic transmission slips when shifting from 1st to 2nd gear but operates normally in all other gears. What is the MOST likely cause?

Accepted Answer

Worn or burned 1-2 clutch pack

Answer

A slip specific to the 1-2 shift typically indicates a worn or burned 1-2 clutch pack that cannot hold properly under load.

Question 2

When pressure testing an automatic transmission, the technician finds that line pressure is low in all ranges. What is the MOST likely cause?

Accepted Answer

Both A and B

Answer

Low line pressure in all ranges points to either a worn oil pump that cannot build adequate pressure or a stuck pressure regulator valve that bleeds off too much pressure.

Question 3

A customer complains of harsh engagements when shifting from Park to Drive. Which component is MOST likely at fault?

Accepted Answer

Accumulator piston or spring

Answer

An accumulator piston or spring that is worn or broken cannot cushion apply pressure, resulting in harsh band and clutch engagements.

Question 4

Technician A says a torque converter clutch (TCC) that never releases can cause the engine to stall at stops. Technician B says a TCC that never applies will reduce fuel economy. Who is correct?

Accepted Answer

Both Technician A and B

Answer

A TCC stuck engaged stalls the engine at stops because the engine is locked to the drivetrain, and a TCC that never applies keeps the converter in slip mode reducing fuel efficiency.

Question 5

What fluid condition would MOST likely indicate that the transmission has overheated?

Accepted Answer

Dark brown or black fluid with a burnt odor

Answer

Dark brown or black fluid with a burnt odor is caused by oxidation and varnish buildup from excessive heat, indicating the transmission has overheated.

ASE - Automotive Service Excellence Certified Tech Practice Test

ASE - Automotive Service Excellence Certified Tech Practice Test

ASE ASE Automatic Transmission and Transaxle