I run/ran spartans. the rear is a damn good unit, bit clanky, but super solid in design. has lived through a blown diff and a blown axle shaft and keeps on taking abuse. I had one in the front, but because of my bent axle tube it got eaten up pretty quick on the trails, but was a good unit while i had it in there. it clattered and shook under steering in town, but was fine on the highway.