Kit contains a ring and pinion set, positraction unit, and installation parts

2005-2011 Ford Crown Victoria (Rear) (Qualifier: with 10 Bolt Rear Cover, with 31 Spline Axle Shaft / Note: 8.8 in. Ford; Gear and Install Kit Package; Includes 3.31 Ratio Gear Set, Master Install Kit, 31 Spline Dura Grip Limited Slip Carrier, 2.25 in. O.D. Axle Bearings and Seals); 1979-2004 Ford Mustang (Rear) (Qualifier: with 10 Bolt Rear Cover, with 31 Spline Axle Shaft / Note: 8.8 in. Ford; Gear and Install Kit Package; Includes 3.31 Ratio Gear Set, Master Install Kit, 31 Spline Dura Grip Limited Slip Carrier, 2.25 in. O.D. Axle Bearings and Seals); 2005-2010 Lincoln Town Car (Rear) (Qualifier: with 10 Bolt Rear Cover, with 31 Spline Axle Shaft / Note: 8.8 in. Ford; Gear and Install Kit Package; Includes 3.31 Ratio Gear Set, Master Install Kit, 31 Spline Dura Grip Limited Slip Carrier, 2.25 in. O.D. Axle Bearings and Seals); 2005-2011 Mercury Grand Marquis (Rear) (Qualifier: with 10 Bolt Rear Cover, with 31 Spline Axle Shaft / Note: 8.8 in. Ford; Gear and Install Kit Package; Includes 3.31 Ratio Gear Set, Master Install Kit, 31 Spline Dura Grip Limited Slip Carrier, 2.25 in. O.D. Axle Bearings and Seals)