This is genuine Dana/Spicer posi trac or limited slip differential additive. You add this to the gear oil of your choice to help lubricate the clutches in the differential. One 4 ounce bottle will do most differentials, although we do recommend two bottles for differential with more capacity, such as a Dana 80. This is [...]

This is a 1 quart bottle of Schaeffer 80-90 synthetic gear oil. This can be used anywhere that a 80-90 GL5 gear oil is specified. This includes differentials and manual transmissions.

We are a distributor for Schaeffer oil and grease. We have this 10-30 diesel engine oil available by the gallon. There are 6 in a case, but this price is per gallon.