Noise at Wheels, Brakes Applied - Groan, Roughness or Chatter

POSSIBLE SOURCE:

- Loose lug nuts.
- Tighten to specifications. Replace wheel if stud holes are elongated.

- Contaminated disc brake rotor or lining surfaces.
- Hand sand corrosion from front disc brake rotor braking surfaces or Replace linings.

- Worn, damaged, dry or improperly adjusted wheel bearings.
- Inspect, lubricate or replace as required.

- Loose or worn front suspension components.
- Inspect, repair or replace as required.

- Disc brake rotor thickness variation.
- Replace or turn front disc brake rotor.

- Disc brake caliper anchor plate loose or missing parts. Also, loose or bent front disc brake rotor shield.
- Replace or repair as required.

- Rear brake roughness.
- Attempt stopping the vehicle using the parking brake. If roughness is present, check brake drums for excessive wear or runout. Refinish or replace as required.

- Brake drum cracked or out-of-round.
- Refinish or replace brake drum as required.

- Wheel/tire imbalance.
- Verify and repair as required.

- Drivetrain imbalance.
- Attempt stopping the vehicle in the neutral transmission position. If roughness is gone, drivetrain should be inspected.