Looking on National Drivetrain website, while researching prices to rebuild my axles, I found that they sell a diff called Monkey Grip for $100 less than the Auburn. Kinda thought it was always between Auburn and True Trac on these trucks...wondering if this Monkey Grip will be any good.

 

Auburn is not rebuildable when it wears out, the monkey grip is but I don't know how good they are. I would skip both of them and go with the Truetrac.