The unloaded Tera CRD60 HD Rear Axle Assembly w/ Semi-Float includes, Spicer Super 60 bearings, semi-float rear axle shafts, and sensors. Add your choice of ring & pinion gear ratio, locker, and carrier. TeraFlex Tera CRD60 HD Rear Axle Housings are perfect for replacing bent, broken, or damaged axles in JL 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 axle’s 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 & pinion strength. Our heavy-duty axle housings feature smooth profile surfaces, axle tubes, all necessary mount brackets, control arm bushings, and more!