Re: Aluminum Diff Covers
If the bolts are a high quality of stainless they won't rust and it never hurts to use anti sieze on any fastner that lives in a harsh enviorment.
I'd be worried about the cover corroding before the bolts especially the exposed parts of the fin's unless theres a clear coat on it.
As for the o-ring seal i don't think it would work on my rear end cuz te housing mount surface has a very rough cut finish from when it was machined and unless yours is really flat and smooth it may not seal so if i were you i'd remove the one on the truck and look at the housing mount surface before you order it.
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