I want to change my diff oil. I want to pull the covers, let every thing drain out, get a good visual on the gears inside as this is a used vehicle, and make sure there are no teeth missing or metal parts floating around that shouldn't be.
I have never done this before so my question is, what do folk recommend for a cover sealant? High temp RTV? The black stuff, the gray stuff that never completely drys? Does it matter?
What do I torque the diff cover bolts to?