Dean at kickass axles did the cryo treated. I'm thinking setup but not sure how. Not that I know everything of course. But I was there for the install & was walked through the process. It seems the pinion go messed up some how. But now I'm sitting on an 8.25 & a bunch of quality parts for it. I'm just going to throw the dana 44 in for now. Really glad I didn't sell it. Now to take the lose in the cost of parts.