Here is a little side note when doing re gear on the Chrysler 8.25 axle. I went with the 4.88 usa standard gear set and also had to order a YUKON notched crosspin. Thats one thing i did not know and it held the axle up for a few days so hopefully you can avoid this with your build and have it ready. The quick fix is to shave some ring gear teeth but I was not going to take that route.