Quote Originally Posted by Ares View Post
If you have original pinion shim at all. Start with it first. I have found it is nearly always the right one. This has worked on my Mustang with three different gear sets and on my Ram front and rear. Also if not using a solid spacer and shims for crush sleeve. Try the Ratech Smart Sleeves. Tried them on my Ram and far, FAR easier to set by hand compared to a normal crush sleeve.
Ive done quite a bit of gear swaps in my vehicles and as you stated factory pinion shim has been right on