I tried the rear diff housing. Its a lot lot quieter now. Cheapest upgrade on the truck followed by aluminum (non bending yet) drive shaft. The straighter rear driveline binds less I think allowing you to use lighter fluids in the center diff while still having all wheel drive. With lighter fluids before my fronts would wear out a lot faster.

Not so much on a brand new set of SS enduros the past week.

Of course most of it is probably due to the insane traction my BCE chassis developed .