AMC Model 20 12-Bolt Aluminum Differential Cover Black w/ Gasket & Hardware

• Black aluminum finned cover for AMC Model 20 rear axle housings, 12-bolt cover pattern

• AMC Model 20 uses a 12-bolt cover with an 8-bolt ring gear — confirm both specs before ordering

• Complete kit — gasket, mounting hardware, and drain plug all included

• Fits Jeep CJ, AMC Javelin, AMC AMX, and Jeep J-Series truck applications

This is a black aluminum finned differential cover built for AMC Model 20 rear axle housings — the rear end used across a wide range of AMC and Jeep vehicles, including CJ-series Jeeps, AMC Javelin, AMC AMX, AMC Matador, and Jeep J-Series trucks. The AMC Model 20 uses a 12-bolt cover pattern with an 8-bolt ring gear — both specs should be confirmed against your axle before ordering, since the ring gear and cover bolt counts differ and are often referenced independently when cross-shopping covers.

This is a complete kit, including a gasket, mounting hardware, and drain plug — everything needed for a clean installation without sourcing additional parts.

The finned aluminum construction gives this cover two advantages over standard steel covers: reduced weight and improved heat dissipation, helping lower gear oil temperature during sustained use — a meaningful benefit on Jeep trail builds and performance AMC builds where the rear axle sees extended load cycles. A black finish adds show-quality appearance for builds where underbody aesthetics matter alongside performance.

Verify your specific axle model, housing shape, cover bolt pattern, and suspension clearance before installation.

Black Finned Aluminum Cover Built for the AMC Model 20 Axle
This finned aluminum differential cover is sized and bolted for AMC Model 20 rear axle housings with a 12-bolt cover pattern, giving you a lightweight, heat-dissipating replacement for the factory steel cover on CJ Jeep, AMC muscle car, and Jeep J-Series truck builds — finished in black aluminum for a clean show-quality appearance.

Fins Dissipate Heat, Aluminum Saves Weight Over Stock Steel
Unlike a flat steel factory cover, the finned aluminum design increases surface area to help dissipate heat from gear oil during sustained use — trail driving, towing, or performance applications where the rear axle sees extended load. Aluminum construction also reduces unsprung weight compared to a steel cover.

What axle does this cover fit?
This differential cover is designed for AMC Model 20 rear axle housings, commonly found on Jeep CJ-series vehicles, AMC Javelin, AMX, Matador, and Jeep J-Series trucks.

How many bolts does this cover use?
This cover uses a 12-bolt cover pattern. The AMC Model 20 also uses an 8-bolt ring gear, so the cover bolt count and ring gear bolt count are different. Verify both specifications before ordering.

Will this fit a Jeep CJ?
Yes. The AMC Model 20 rear axle was commonly used on Jeep CJ-5, CJ-6, CJ-7, and CJ-8 Scrambler models. Verify your specific axle before ordering.

Will this fit a Jeep Wrangler YJ or TJ?
No. Jeep Wrangler YJ and TJ models typically use Dana 35 or Dana 44 rear axles and are not compatible with this AMC Model 20 differential cover.

What's included in this kit?
This complete kit includes a black finned aluminum differential cover, gasket, mounting hardware, and drain plug.

Why choose a finned aluminum cover over a standard steel cover?
The finned aluminum design helps dissipate heat more efficiently than a conventional steel cover, helping reduce gear oil temperatures during demanding driving conditions. Aluminum construction also weighs less than steel.

Will this fit a GM or Ford rear axle?
No. This cover is designed specifically for AMC Model 20 rear axles and is not compatible with GM or Ford axle assemblies.

Does this come with a gasket and hardware?
Yes. The kit includes a gasket, mounting hardware, and a drain plug for installation.

What material is this cover made from?
This differential cover is manufactured from black aluminum and features an external finned design for improved heat dissipation.

What should I verify before installing this cover?
Verify the axle model, 12-bolt cover pattern, 8-bolt ring gear, housing shape, fill plug location, fluid capacity, and suspension clearance before installation.