Noise and Vibration Analysis

A noise or vibration that is noticeable when the vehicle is in motion may not be the result of the transmission. If a noise or vibration is noticeable in "P" (park) or "N" (neutral) with the engine at idle, but is less noticeable as engine RPM increases, the cause may be from poor engine performance.

Inspect
1. Tires for:
- Uneven wear.
- Imbalance.
- Mixed sizes.
- Mixed radial and bias ply.

2. Suspension components for:
- Misalignment and wear.
- Loose fasteners.

3. Engine/Transmission mounts for:
- Excessive wear or damage.
- Loose mounting bolts.

4. Transmission case mounting holes for:
- Missing bolts, nuts or studs.
- Stripped threads.
- Cracks.

5. Flywheel for:
- Missing or loose bolts.
- Cracks.
- Imbalance.

6. Torque converter for:
- Missing or loose bolts or lugs.
- Missing or loose balance weights.