Inspect for proper gear oil levels prior to performing system diagnosis.

Low gear oil levels

Faulty oil seal or other types of leaks may contribute to lower than required fluid levels.

Fill to the proper level with gear oil Saturn P/N 12378514 or equivalent.

Worn or loose axle mounts

Repair or replace axle mounts as required.

Worn propeller shaft constant velocity or universal joints

Replace the constant velocity or universal joints as required.

Refer to Propeller Shaft Replacement in Propeller Shaft.

Worn propeller shaft center bearing assembly

Replace the center bearing assembly.

Bearing noise within axle assembly

This type of noise will decrease or increase relative to the vehicle speed.

1. Check for the proper fluid level. Fill as required.
2. Repair or replace the unit as required.

Gear set whine noise within the carrier assembly caused by incorrect backlash

A whine type of noise will increase or decrease relative to the vehicle speed.

1. Check for the proper fluid level. Fill as required.
2. Repair or replace the unit as required.