1976-83 CJ Model 20 Narrow Trac 4140 Chromoly Discovery Series Rear Kit Revolution Gear and AxleRevolution Gear and Axle Discovery Series 1 Piece Narrow Trac 4140 Chromoly Rear Axle Kit, fits 1976 83 CJ 5 and 1976 81 CJ 7. Rear axles feature 5x5. 5 Bolt Pattern. This Revolution Gear and Axle Rear Axle Kit ships with bearings, seals and retainers pressed together and ready to install. And includes Qty10 Wheel Studs (Not Installed). Revolution Gear and Axle Discovery Series Axles are backed by a 10 Year Warranty covering manufacturing defects and