Thanks for the info Gary, made me check my 2016 157" wb with 5.0 w 4x4 and 3.55 elec locker has the 9.75.
It did the trick today in a long steep climb while working on a public trail that I didn't want wheel spin wrecking the walking surface.
I agree with Tom, not really a weak link in the rear ends if matched to their application and gvr.
just keep em full of oil
so don't smack the diff cover !