9-Plus Rear End Gear Oil (SAE 85W/140)

1 quart bottle of 85-140 weight 9-Plus gear oil highly recommended for use in all rearends. Posi traction additive must still be used in addition to this oil.

The following are estimations of oil capacities for your new differential. Extreme pinion angles and applications, as well as aftermarket components (such as diff covers) added to the unit may drastically change the unit’s capacity.
 

9” Ford (non-F9)......................3 qts
F9 3” or 3.25”  tube.................4 qts
F9 3.5“, 4” or 4.5” tube............5 qts
8“ Ford.......................................2.5 qts
8.8” Ford....................................2.5 qts
12 Bolt GM................................2.5 qts