What is the failure mode for gm rear ends in CMC?

My first one went simply because the ring gear boots were loose, and even then it was fine except for the broken teeth from loose bolts flying around.

I chipped a ring tooth on the second one but I had issues with that build with a loose pinion nut, and later running it all setup wrong and super tight when we took my rear end apart for no reason at all at the track.

I think just a properly setup rear end with a crush sleeve eliminator and heavy oil is all that's needed. I run 85w-140.

That fancy diff cover just adds support to the main caps. I don't believe we're drag racer blowing apart rear end housing are we?