Join Date: Sep 2007
Location: Franklin Park N.J.
Re: Diff fluid
It says use 75w140 for the rear....Does the royal purple have the limited slip additive in it ?....And the front is 75w90....Can you put the same weight (75w140) in both or should I just use the 75w90 for the front ?
And how do i tell if I have LS....When I first go the truck it would do 2 wheel stand stills....Now its a peg legger
You dont need any additives with the royal purple, Use the recamended weight at both ends. There should be a tag on the diff cover that should tell you if its an ls or not.
06 F350 CC LB 4x4 with a few odds and ends