Ford Racing - M-4204-T31Differential Carrier - T-2 Torsen - 31 Spline - Steel - Ford 8.8 in - EachTorsen® Differential; Fits 8.8 in. Ring Gear; 10 Bolt; Rear; -2 Type; 31 Spline; Limited Slip;These Ford Racing Torsen differentials use a worm gear...