Road Test Quick Checks

1. 24-80 kph (15-50 mph): With light acceleration, a moaning noise is heard and possibly a vibration is felt in the floorpan. It is usually worse at a particular engine speed and at a particular throttle setting during acceleration at that speed. It may also produce a moaning sound, depending on what component is causing it. Refer to Tip-In Moan in the Symptom Chart. Symptom Related Diagnostic Procedures

2. High speed: With slow acceleration and deceleration, a shake is sometimes noticed in the steering wheel/column, seats, floorpan, trim panels 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 High Speed Shake in the Symptom Chart. Symptom Related Diagnostic Procedures

3. High speed: A vibration is felt in the floorpan or seats with no visible shake, but with an accompanying sound or rumble, buzz, hum, drone or booming noise. Coast with the transaxle range selector in NEUTRAL and engine idling. If vibration is still evident, it may be related to wheels, tires, brake rotors, hubs or bearings. Refer to High Speed Shake in the Symptom Chart. Symptom Related Diagnostic Procedures

4. High speed: A vibration is felt whenever the engine reaches a particular rpm. It will disappear in neutral coast. The vibration can be duplicated by operating the engine at the problem rpm while the vehicle is sitting still. It can be caused by any component, from the accessory drive belts to the torque converter, which turns at engine speed when the vehicle is stopped. Refer to Engine Accessory Vibration in the Symptom Chart. Symptom Related Diagnostic Procedures

5. Turning: Noise and vibration, clicking, popping or grinding noises heard while turning may be due to the following:
a. cut or damaged front wheel driveshaft joint boot resulting in inadequate or contaminated tube fill in outboard, front wheel driveshaft joint or front wheel driveshaft and joint.
b. other component contacting halfshaft assembly.
c. worn, damaged or improperly installed wheel bearing.
d. worn, contaminated, or dry inboard cv joint stub shaft pilot bearing housing or outboard CV joints.