Restricted or damage ventilation tube assembly

Replace the ventilation tube as required.

Leaking fill or drain plugs

Install sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent onto the threads of the plugs, and tighten the plugs per specifications.

Worn or damaged pinion oil seal

1. Inspect the input flange seal 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.

Worn or damaged axle shaft oil seals

Replace the axle shaft oil seals as required.

Axle housing porosity

Replace the housing or housings as required.