For Use in Limited-Slip Differentials to Reduce Chatter and Gear Noise. One Bottle Per Axle is all that is Needed. Tapered Cap Included with Every Bottle. It is Straight From Amazon.
Ford Motorcraft XL-3 Friction Modifier Additive Case of 6 Bottles
3 Qt. 80W90 Conventional Gear Oil with Friction Modifier Additive
Motorcraft XL-3 C8AZ19B546-1 Friction Modifier Additive Case of 12
Motorcraft XL3 Friction Modifier Additive Limited Slip Differential Ford 2 Pack