are you wanting to keep the stock tcase gears or re gear the rear case your gonna at least need a case adapter to mate the front and rear case youll need to shorten rear d shaft and legnthen front umm...what motor you got if its the 3.0 V6 your gonna have to get a v6 adapter and find another case as the v6 case is chain driven the adapter will let you mate the gear driven case to the back of your v6 tranny