ASE G1 Auto Maintenance and Light RepairSuspension and SteeringMedium
A customer complains of a grinding noise that is most noticeable when turning sharply at low speeds. The noise seems to be coming from the front wheels. What is the MOST likely cause?
- ADefective wheel bearing
- BWorn constant velocity (CV) joint
- CWorn inner tie rod end
- DLoose steering rack mounts
Show answer & explanationAnswer & explanation
Correct answer: B. Worn constant velocity (CV) joint
A grinding or clicking noise, especially during turns at low speeds, is a classic symptom of a worn or damaged constant velocity (CV) joint, which is common in front-wheel-drive vehicles.
Why the other options are wrong
- A. A defective wheel bearing usually causes a humming or roaring noise that changes with speed, and often gets louder when turning in one direction.
- C. A worn inner tie rod end typically causes loose steering, wandering, or clunking, not grinding during turns.
- D. Loose steering rack mounts would typically cause a clunking noise over bumps or when turning the steering wheel, not a grinding noise during turns.
Constant Velocity (CV) Joint Failure
Failure of the flexible joint that transmits power from the transaxle to the wheels at a constant speed, allowing for suspension travel and steering.
- Common in front-wheel-drive vehicles
- Symptoms include clicking/grinding noise during turns
- Often caused by torn boots allowing dirt/moisture in
Memory trick: Turning sounds often point to axles.