Well, seeing as how I was dumping so much money into mine (I did 5.83's and ARB's at the same time), I put them together as best I could, then took them up to Spidertrax (they're about an hour drive from where I live, and they're GURU's of the Suzuki world), and swapped my stock 5.12 diffs for the labor to be sure they were set up correctly. I just had my rear 3rd member out (removing the remains of a twisted-off axle), and the R&P's are in fine shape, after a lot of hard use, including two trips to Moab.