Road Test Quick Checks

1. 24-80 km/h (15-50 mph): With light acceleration, a moaning noise is heard and possibly a vibration is felt in the front floor pan. It is usually worse at a particular engine speed and at a particular throttle setting during acceleration at that speed.

Refer to Tip-In Moan in the Symptom Chart. Symptom Related Diagnostic Procedures

2. Acceleration/Deceleration: With slow acceleration and deceleration, a shake is sometimes noticed in the steering wheel/column, seats, front floor pan, front door trim panel or front end sheet metal. It is a low frequency vibration (around 9-15 cycles per second). It may or may not be increased by applying brakes lightly.

Refer to Idle Boom/Shake/Vibration in the Symptom Chart. Symptom Related Diagnostic Procedures

3. High Speed: A vibration is felt in the front floor pan or seats with no visible shake, but with an accompanying sound or rumble, buzz, hum, drone or booming noise. Coast with the clutch pedal depressed or the transaxle shift lever in neutral and engine idling. If vibration is still evident, it may be related to wheels, tires, front brake discs, wheel hubs or front wheel bearings.

Refer to High Speed Shake in the Symptom Chart. Symptom Related Diagnostic Procedures

4. Engine rpm Sensitive: A vibration is felt whenever the engine reaches a particular rpm. It will disappear in neutral coasts. The vibration can be duplicated by operating the engine at the problem rpm while the vehicle is stationary. It can be caused by any component, from the accessory drive belt to the clutch or torque converter which turns at engine speed when the vehicle is stopped.

Refer to High Speed Shake in the Symptom Chart. Symptom Related Diagnostic Procedures

5. Noise and Vibration While Turning: Clicking, popping, or grinding noises may be due to the following:
- cut or damaged front wheel halfshaft joint hoot, resulting in inadequate or contaminated tube fill in the outboard front wheel halfshaft joint or inboard front wheel halfshaft joint
- loose front wheel halfshaft joint boot clamps
- another component contacting the halfshaft
- worn, damaged, or incorrectly installed front wheel bearing
- worn, contaminated, or dry inboard front wheel halfshaft joint or outboard front wheel halfshaft joint
- damaged powertrain/drivetrain mounts