Hey guys just wanted to know what gear oil people are running in their stock 10 bolt non posi 8.5 rear ends. Thanks!
I use the heavier 85/140 in all of my builds. If it had a clutch or cone style posi unit,then it gets conventional oil. If it is an open,Tru Trac,or spool,it can get synthetic.
This is what I use, https://shop.advanceautoparts.com/p...rmance-80w90-gear-oil-1-quart-vv831/7070003-P With 1 bottle of GM Posi additive which you don't need.