http://www.ultimaterc.com/forums/sho...d.php?t=116675
feel bad for posting a link to another forum but I don't have the time to do my own how to right now for everyone. These are the same steps I took to seal the diff and it works great. Only thing I did different was to use axle spacers instead of the Teflon shims so I could get the spacing for the diff exacly how I wanted it inside the tranny case. I run 5k inside mine and it's perfect. Would switch to 3k for tracks with medium traction.