ORIGINAL: Sean70

Foxy42- The best diff you can get for your FG MT is the FG viscous diff and add the extra 6 plates option with 22ml of 4000 weight FG shock oil. This will produce the best locking effect. You will still need to setup your rear suspension especially when running in the dirt, in order to transfer the weight as much as possible onto the rear wheels to have them push into the ground so they grip up as much as possible and then with the viscous diff turning both wheels together it will hook up and take off. Otherwise without correct weight transfer any locking diff will cause your car to step out sideways under load.

Part Numbers - FG Viscous Diff - 8603, FG Viscous Fin/Plate Package - 8601, FG 4000 Weight Shock Oil - 6510/40