STS RWD V8-4.6L (2007)
Tighten the differential drain plug to 39 N.m (29 lb ft).
2. Clean any dirt from around the differential fill plug.
3. Remove the fill plug from the differential.
4. Fill the differential with 75W90 synthetic axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent. Refer to Approximate Fluid
Capacities.
5. Inspect the gear lubricant level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
6. Install the fill plug to the differential.
Tighten the fill plug to 39 N.m (29 lb ft).
7. Lower the vehicle.
