: I have a limited slip diff with no 33.11-1207 719.0 666-40 : Can anyone tell me more about: : -final drive There should be a metal tag on one of the rear cover bolts with the final drive ratio (and an S for limited slip) : -original type of car it belongs to : -what diff fluid is required I've had good luck with Red Line synthetic gear lube. : Thanks, : Jeroen