can anyone give good advise on how tight the rear diff needs to be on a t3 mod . if i tighten it more than 3/4 turn from bottomed it handles real bad .but it has a lot more drive. thanks
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.