Getting ready to change out diff fluids .......just making sure I dont need anything else but 4 quarts for the rear and 3 for the front. Gaskets are re-useable as I understand. NO additives as in limited slip stuff , correct ?

 

I used 7.5 qts of Amsoil to do both of mine. Yes 75w90 synthetic is what to use in your diffs and no additive is needed. If you tow a lot many use 75w140 or you can try the newest one out from Amsoil it's a 75w110.

 

does it have to be synthetic ??

 

synthetic is the way to go...... im running 75-140 in mine.

check your rear diff for a tag that will specify if you need the LS additive or not....

bring a spare tube of silicone w/ ya incase the gaskets arent reusable....... ive never seen a reusable diff cover gasket since ive been in the auto industry, but maybe its another kool new thing?

 

My 06 had a reusable gasket on it. I would use synthetic and like they said 75 90 or 75 140 if you do a lot of heavy towing down there in Texas

 

No additive is needed in any 3rd gen axle.

 

Don't know about the older ones but the owners manual shows Synthetic fluid for both axels in my 06.

 

mobil one synthetic 75w90 ($38) 4 quarts, short a couple ounces to fill completely... gasket was re-usable.........thanks fellas now I gotta do the fron

 

I would get 5 qt's. I changed mine for the second time today at 75k. It has been 50k since last change and oil and will go 75k before next change. No wear at all just polished up a bit. I went with quaker state syn. 75-90 as the mopar stuff was just too high. Mine took 4.5 qt's both times and the gasket is a heavy rubber steel reinforced gasket that should be fine. I had a hub seal installed today as mine was leaking so hopefully new fluid will stay where it should.

 

No additive in the AAM axles. The Dana rear ends required it. Yes, synthetic.
Cheers
Mike
###