I am about to change my differential fluid in my truck. It's an 03 with the Ford 8.8 and 4:10 with limited slip. The owner's manual calls for 80w-90 oil but after researching, I am seeing that many people are using different weights. Just wonder if anyone on here has recommendations for a certain weight.

Alex

 

I'd put stock back in but dont forget the friction modifier.

 

Ok, if i buy like valvoline gear oil with the addiditives in it, will it have enough or should i add a little extra? Thanks for your help!

 

The "limited slip" gear oil will not require anything additional.

 

Ok, Thank you guys for the help!