im fixin to pull the cover off my rear diff to check some things. what fluid are you guys puttin back in there? what brand? 75w-90 synthetic is what the book calls for. its goin to be for the truck in sig..
Thanks..

 

I just changed all my fluids to AmsOil. Used the Chevy friction modifier, too.

 

Pick a brand - it really doesn't matter. Just use the recommended weight synthetic as you listed.

I use Mobil1.

 

Do not forget a new gasket. 75w-90 will be great and if your truck is like mine you will not need any additional additives if your lube has it in. Grab 3 quarts of whatever you choose.

 

new gasket? what if i used some "gasket maker"? the black stuff.
from my other post, about the annoying sound that my truck is making. im thinkin its comin from my rear diff? or axle bearings? but i just wasted the $165 on a front right hub that i thought the noise was comin from... THIS IS GETTING OLD FAST... and im goin to go ahead and get some new ujoints while im replacing stuff.... Wish Me Luck!!
and i think the noise is gettin worse?? how can i tell that the axle bearings are goin out? any suggestions? it they arent too expensive im goin to go ahead and slap them in.. now would be a good time to put some lower gears and a better locker or lsd.. Yea I Wish!!

 

That should be fine, but a gasket sure is less messy.

Maybe it could be the front left hub?

 

2 quarts of castol syntec 75-90w or whatever it is with limited slip additive

 

na. come to find out. the noise is comin from the rear??

 

I use RedLine SuperLight ShockProof Diff fluid:
(http://www.redlineoil.com/products_g...D=20&prodID=61)

 

The shop I took my truck to put in some Kendal 85w90, I have about 80 passes in the 1/4 mile on that, everything is good to go

http://www.kendallmotoroil.com/NR/rd.../K_All_Oil.pdf