Noise and Vibration Analysis

A noise or vibration that is noticeable when the vehicle is in motion may not be cause by the transmission.
A noise or vibration that is noticeable while the vehicle is in the P (Park) or the N (Neutral) position with the engine at idle, but is less noticeable as the RPM increases, may be the result of poor engine performance.
Inspect the following components for the conditions stated:
^ Tires and wheels-Uneven wear; imbalance; mixed sizes, or types.
^ Suspension components-alignment and wear; loose fasteners. Refer to the Sterring and Suspension.
^ Engine and transmission mounts-damage; loose bolts.
^ Transmission case mounting holes-Missing bolts, nuts, and studs; stripped threads; cracks.
^ Flywheel-Missing or loose bolts; cracks; imbalance. For flywheel balancing, refer to Engine Flywheel Replacement in Engine.
^ Torque converter-Missing or loose bolts or lugs; missing or loose balance weights; imbalance.