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

Operate the vehicle turning in tight circles, in both left and right directions.

Moan, groan, chatter, or a pulsing type concern may indicate a pump or clutch park problem within the axle assembly.

Worn or loose rear axle mounts

Repair or replace as required.

Worn axle shaft constant velocity joints

Replace the constant velocity joints as required.

Worn wheel bearings

Replace the wheel bearings as required.

Incorrect gear oil

Replace with gear oil Saturn P/N 12378514.

Refer to Rear Axle Lubricant Replacement .

Worn differential side and/or idler gears and worn cross-pin

Replace gears and pin as required.

Worn clutch plates

Replace clutch drum.