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:
^ Wheels and Tires - Uneven wear; imbalance; mixed sizes, or types.
^ Suspension components - alignment and wear; loose fasteners. Refer to Steering 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.
^ Torque converter - Missing or loose bolts or lugs; missing or loose balance weights; imbalance.