We thought this would be a good visual example recorded by David Grayzanic on how to resurface the differential’s gears if it’s needed. Only when you have your Phantom Grip Limited Slip Kit in hand, and your ready to install the lsd kit into your open diff, will you know if you,
1: Have the correct lsd kit
2: Need to resurface the gears due to some clearance tolerances
So, once you confirm that the need to resurface the gears is needed, due to a raised casting lip, or just some height allowance, this is one of the best steps, if you have access to these types of machines.