A dynatrack cover.
Don't let fear and common sense hold you back
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Honestly, you don't need any armor, you just need to make sure to use a good RTV, apply it correctly and, if the lip of your diff cover is hanging down a bit below the housing, grind it down so that it sits flush or just a hair above the base of the diff. Catching the lip of the cover on the rocks is what causes leaks and so long as you mitigate that, you should be okay. Diff covers like what Dynatrac are designed specifically to offer more resistance to the separation of the cover from the diff housing too.
When I peeled my stock covers, I replaced them with solid brand covers. They are thick and priced well. The stock covers are really pretty thin and I bent the rear twice (hammered it flat and resealed the first time). Was tired of resealing and buying new fluid. An added benefit is the slightly larger fluid capacity which can't hurt.
What gear oil is recommended to use? Will be doing this also. Thanks!
If you have a limited slip, you'll want to use a synthetic oil as they typically come with a friction modifier in them. Otherwise, any regular gear oil will get the job done. I typically use something like Valvoline synth oil or the like as opposed to Royal Purple but only because the later is so expensive. When you're servicing your diffs as often as you should, the money adds up quick.