The fact that AMC 20 housings vary up to ½ inch in width also adds frustration to the installation of axles that use shims for endplay adjustment. Most modern-day kits like the one from Superior ...

The AMC Model 20 rear axle was at one ... use of a shop press for the bearing installation. We can now drive the Jeep with greater confidence in the rear-axle strength and brake condition, and ...