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 the PARK or the NEUTRAL position with the engine running at idle, but is less noticeable as the engine RPM increases, the cause may be from poor engine performance.

1. Inspect the tires for the following conditions:

•	Uneven wear

•

Imbalance

•	Mixed sizes

•	Mixed radial and bias ply.

•	Refer to Tires and Wheels.

2. Inspect the suspension components for the following conditions:

•	Misalignment and wear

•	Loose fasteners.

•	Refer to Front Suspension.

3. Inspect the Engine/Transmission mounts for the following conditions:

•	Excessive wear or damage

•	Loose mounting bolts.

•	Refer to Engine Mechanical, Transfer Case or Transmission Assembly.

4. Inspect the transmission case mounting holes for the following conditions:

•	Missing bolts, nuts or studs

•	Stripped threads

•

Cracks

5. Inspect the flywheel for the following conditions:

•	Missing or loose bolts

•

Cracks

•

Imbalance

•	Refer to Engine General Information and Mechanical Diagnosis.

6. Inspect the torque converter for the following conditions:

•	Missing or loose bolts or lugs

•	Missing or loose balance weights

•

Imbalance

•	For complete 03-72LE, 4-speed automatic transmission unit repair procedures, refer to the Transmission/Transaxle/Transfer Case Unit Repair Manual.