AMC 20 Rear Axle & Differential Parts for Jeep CJ5
Axle Shafts, Wheel Bearings & Differential Parts for Reliable Power Delivery (1972–1983).
Why the AMC 20 Rear Axle in the Jeep CJ5 72-83 Needs Attention Over Time.
Starting in 1976, Jeep switched the CJ5 to the sturdier AMC 20 rear axle, which handles higher torque than its predecessors and still has a reputation for durability today – though wear is unavoidable. Axle shafts are under constant torsional load and can develop cracks under hard off-road use, while wheel bearings develop play over time, showing up as running noise. Pinion bearings inside the differential carrier wear and cause vibration or whining, and axle and pinion seals harden and let gear oil escape. Differential covers corrode, especially after water crossings, and on vehicles with a Trac-Lok limited-slip differential, the clutch packs wear down. Anyone driving off-road regularly or running larger tires should keep a close eye on these components.
- Axle Shafts & Hardware: The complete axle shaft kit and the axle shaft nut, washer and key set.
- Wheel Bearings & Hubs: The complete wheel bearing kit and the matching wheel stud for the hub.
- Driveshaft & U-Joints: The U-joint strap kit and the pinion yoke for power transfer.
- Ring & Pinion Sets: For different gear ratios, choose from the 4.10 set or the 3.54 ratio.
- Differential Components: The standard differential spider gear kit and the Trac-Lok version for a full rebuild.
- Seals & Bearing Components: The differential cover gasket and the differential side bearing set for smooth, play-free operation.
Four Trusted American Brands for Your AMC 20 Rear Axle.
Axle shafts, wheel bearing kits, differential spider gear kits, and gaskets come from Crown Automotive, while pinion yokes, pinion bearings, and differential side bearing sets are supplied by axle specialist Dana Spicer. Wheel studs come from Dorman, complemented by ring and pinion sets from Omix – four names that stand for American engineering behind your rear axle.
Your Partner for the AMC 20 Rear Axle.
Whether you need a single wear part or a full differential rebuild, we're happy to help with questions on shim selection, torque specs, and correct assembly order, including compatibility questions for the CJ7, CJ8, and SJ/J-Series models. Shipping goes out within the next business day.