[Dragsinger]

What Ed says is correct, that is my method. All bearings in the assembly have "just enough" preload to made that happen.

In my experience, there is no need for preload beyond just having the slack out.

NOTE: with a situation of very high horsepower the setup could be different but I do not deal in that area. My experience is with stockers, super stockers and street driven cars.

I like the Chevy 12 bolt and think it is a good choice for many builds. Yet, the factory housings are disappearing quickly.