Restricted or damaged ventilation tube assembly

Replace the ventilation tube as required.

Leaking fill or drain plug

Install sealant, GM P/N 12346004 (Canadian P/N 10953480) or equivalent onto the threads of the plugs and tighten.

Refer to Fastener Tightening Specifications .

Leaking input flange seal

1. Inspect the input flange surface for excessive wear or damage.
2. Inspect the front bearing for wear or damage. A worn bearing may allow excessive movement of the clutch pack input shaft.
3. Replace the components as required.

Leaks at the housing sealing surfaces

Disassemble the axle and reseal the sealing surfaces as required - clutch drum cover only.

Refer to Rear Wheel Drive Module Clutch Housing Replacement .

Worn or damaged axle shaft oil seals

Replace the axle shaft oil seals as required.

Axle housing porosity

Replace the housing(s) as required.

Refer to Rear Axle Shaft Seal Replacement - Left Side and Rear Axle Shaft Seal Replacement - Right Side .