Rear Drive Axle (8.6" Axle)

Lubricant

12378261 or equivalent meeting GM Specification 9986115

Rear Drive Axle (9.5", 10.5" Axles - with RPO G80)

Lubricant

1052271 only

Rear Drive Axle (9.5", 10.5" Axles - without RPO G80)

Lubricant

1052271 or SAE 80W-90 GL5

Pinion Gear Bearing Retainer

Sealant

1052942 or equivalent

Pinion Yoke Splines

Sealant

12346004 or equivalent