The complete Tera CRD60 HD Rear Axle Assembly w/ Semi-Float provides a choice of pre-installed Super 60 ring and pinon gears, ARB air locker, and semi-float outer axles as well as inner axle shafts, and sensors. TeraFlex Tera CRD60 HD Rear Axle Housings are perfect for replacing bent, broken, or damaged axles in TJ Wrangler/Unlimited vehicles including Rubicon models. Can also be used as a direct bolt-on upgrade for Jeep owners looking to beef up the stock axles� weak areas. The exclusive Constant Radius Design (CRD) provides high ground clearance that is unaffected by pinion angle adjustments. Compatible with all Super 60 gear ratios for extreme duty applications requiring additional ring and pinion strength. Our heavy-duty axle housings feature smooth profile surfaces, axle tubes, all necessary mount brackets, control arm bushings, and more!