ASE Automatic Transmission and Transaxle Flashcards
6 cards from real ASE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ASE Automatic Transmission and Transaxle flashcards as text
A technician performs a hydraulic pressure test and finds that reverse pressure is normal but drive pressure is low. This MOST likely indicates a problem with the:
Answer: Forward clutch circuit
Low pressure specifically in Drive but normal in Reverse points to a leak in the forward clutch hydraulic circuit, since the forward clutch is only applied in drive ranges.
What component in an automatic transmission controls the timing and quality of shifts in a modern electronically controlled unit?
Answer: Valve body solenoids controlled by the TCM
In modern electronically controlled transmissions, the TCM commands shift solenoids in the valve body to precisely control shift timing, feel, and quality.
A front-wheel-drive vehicle equipped with a transaxle has a clicking noise that occurs only when turning. What is the MOST likely cause?
Answer: Worn outer CV joint
A clicking noise from a FWD vehicle that occurs specifically during turns is the classic symptom of a worn outer CV joint, which is stressed at high angles during cornering.
After replacing an automatic transmission, the technician finds the vehicle has a 2-3 shift flare. What was MOST likely overlooked during the rebuild?
Answer: The 2-3 clutch pack clearance was set too wide
Excessive clutch pack clearance causes a flare on apply because the clutch plates must travel too far before clamping, creating a momentary loss of drive during the 2-3 shift.
Technician A says adaptive shift strategy in modern transmissions allows the TCM to relearn clutch apply pressures over time. Technician B says after replacing a transmission, a reset or relearn procedure may be required. Who is correct?
Answer: Both Technician A and B
Modern TCMs use adaptive learning to compensate for clutch wear; a new or rebuilt unit starts without learned values, so a reset or drive-cycle relearn is often required for proper shift quality.
What is the MOST common cause of automatic transmission overheating in a vehicle used for towing?
Answer: Insufficient cooler capacity for the added load
Towing significantly increases transmission heat output; the factory cooler is often sized for normal use and lacks the capacity to dissipate the added heat, causing overheating.