Originally Posted by 89white GT
Just ordered a new LPW ultimate 8.8 diff cover and hardware. Wondering what else I need. What kind of RTV? What kind of rear end fluid and how much? Any additive? Do I put loctite on the diff cover bolts? Do I use a gasket?
I use an oil resistant silicone (some silicone sealer is for water/coolant only) wiped thinly on both sides of a gasket and let it dry completely before installing in most cases.
However in this case I would use a thin coat of silicone directly on the cover and just let it skin over before installing. The reason is that if you ever plan on installing the side support braces you want your cover to be mounted as solidly as possible and not able to move around like a gasket might let it do.
I use Blue Loctite and the copper sealing washers on the mounting studs to help hold the cover on and to seal up the studs and prevent any possible leaks.
For lube I use the thinner rear end grease (75/90) in my car. My thoughts are that since I don't plan on road racing or driving for really long distances I can get by with the thinner lube and it will take a bit less power (minuscule amount really) to turn the differential. A synthetic lube will work well and help save a bit more power too.