I have a grinding noise when I turn the truck. I just put all new bearings in the rear end and new traction lock gears and cluthes. New bearings means pinion, carrier, axle. Using plain 90 weight oil in differential. Didnt use friction modifier. Anybody help?

 

try some lsd additive or friction modifier i recommended ford but others will work

 

Why didn't you use the additive? And why are you confused now - you apparently knew you weren't doing it right. Same with the 90W; it should have 75-80W90. Did you even soak the clutches? Click my black Bronco in my signature & read the captions in the 8.8" Axle album.

 

The mere fact that you wasted money on the stock Trac-Loc shows you didnt research this very much. Do as the others have said and you should be alright.

 

wow the pre guys sure aren't very nice here. I'd pull the diff cover and at least have a look. Sounds like maybe youy clutches may be in wrong. SOunds like what happend to me when I grenaded my spider gears in my 96

 

There is a difference between not being nice and not condoning stupidity.