ASE G1 Auto Maintenance and Light RepairManual Drive Train and AxlesEasy
A technician is inspecting a front-wheel-drive vehicle with a manual transaxle. The customer complains of a clicking or popping noise when turning sharply. Which of the following components is MOST likely the cause?
- AInput shaft bearing
- BCV joint
- CPilot bearing
- DRelease bearing
Show answer & explanationAnswer & explanation
Correct answer: B. CV joint
A clicking or popping noise during sharp turns in a front-wheel-drive vehicle is a classic symptom of a worn or damaged Constant Velocity (CV) joint. These joints allow the drive axles to transmit power while accommodating steering and suspension movement.
Why the other options are wrong
- A. Input shaft bearings are internal to the transaxle and typically cause a whine or growl, not clicking during turns.
- C. Pilot bearings support the transmission input shaft in the crankshaft and cause noise when the clutch is disengaged.
- D. Release bearings are part of the clutch assembly and typically cause noise when the clutch pedal is depressed.
CV Joint Failure
Constant Velocity (CV) joints allow for variable angles and lengths of the drive axle shafts while transmitting torque smoothly. Failure often results in clicking noises during turns.
- Connects transaxle to wheel hub in FWD vehicles.
- Allows for steering and suspension movement.
- Worn or damaged joints often click or pop during turns.
Memory trick: Clicking turns mean CV joint learns.