Them guys at Predator did it. I had them build the axles.. lockers, gears, axles.
The first set of gears were U.S. Alloy, they shredded themselves in 500 miles. They were shipped back to see if the hardening process was messed. The second set was Yukon, they felt good until I got back from Eagle Rock. It felt like the spider gear pins broke. but the backlash was only out at .012 in the rear.
.004 doesn't seem like a lot but it felt like both axles wanted to jump off the jeep.
They replaced the bearings on the rear pinion, as well they should. Told them they are at least responsible for a few thousand miles.
But to answer your question... I don't know how they get 150 -175 ft lbs on that nut with nothing holding the carrier. Maybe they shoved a rag in there.
The reason I won't work on gears is I don't know how they get the coast side right. That's just too much in and out for me.
If I don't get it right in 3 attempts, I give up.