2001 Ford E450 Rear Diff.
What fluid goes into the rear pumpkin/Diff?? Is it gear oil and if so what kind?? Thanks
Forum Discussion
As stated it is 75-140 synthetic oil. The diff cover should not have a gasket but rather RTV sealant from the factory. There is a plug on the side which is the full mark and can be used to add fluid as well. If you remove the cover you will need 3 quarts and a tube of posi additive to refill. Piece of advice....be sure the cover is not rusting through causing the leak. Ford had issues with this until 07 when the cover became aluminum....I know cause mine let go resulting in a total diff replacement. A new cover for 30 bucks is well worth the investment if changing the gasket
