1976-83 CJ Model 20 Narrow Trac 4140 Chromoly Discovery Series Rear Axle Kit Revolution Gear

1978-79 Ford Dana 60 4340 Chromoly Discovery Series Front Axle Kit, 35 Spline, HD U-Joints Revolution Gear

2007-18 Wrangler JK Dana 44 4340 Chromoly 30 Spline Discovery Series Rear Axle Kit Revolution Gear