Originally Posted by
rx7ttlm
if you sand the diff rings with 800 grit sand paper till they are flat. and use associated diff lube the diff will require less preload and slip less. Tighten till you can't spin the diff while holding the spur gear and one tire. Ie there should be no slippage during a bench test.
The guys on the xray forum suggest you need a bit of slip in the diff for it to work right. So where you say "no slippage" they would say a little slippage when using a lot of force. Playing with the amount of slip does make a big difference with handling. Luckily xray makes it easy to adjust.