AMC Model 20 12-Bolt Fiber Differential Cover Gasket

This is a fiber differential cover gasket sized and punched for AMC Model 20 rear axle housings with a 12-bolt cover pattern. It's a direct replacement for a leaking, damaged, or missing cover gasket on compatible AMC Model 20 axle applications, providing a reliable fiber seal between the differential cover and the axle housing sealing rail during cover reinstallation, fluid changes, or cover upgrades.

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 cover bolt count and ring gear bolt count differ on this axle and are often referenced independently when cross-shopping gaskets. This axle is commonly found in Jeep CJ-series vehicles, AMC Javelin, AMC AMX, AMC Matador, and Jeep J-Series trucks.

This gasket is sold individually and includes no hardware, cover, or drain plug. If you need a complete installation kit including cover, gasket, and hardware, TSP also offers the AMC Model 20 polished aluminum cover as a complete kit (SP4906KIT). Confirm your axle model and cover bolt pattern before ordering, and clean the cover and housing sealing surfaces thoroughly before installation.

 

Fiber Gasket Cut for the AMC Model 20's 12-Bolt Cover Pattern
This fiber differential cover gasket is punched to match the 12-bolt cover pattern of AMC Model 20 rear axle housings, giving you a clean, leak-resistant seal between the differential cover and the axle housing sealing rail during cover reinstallation or replacement.

12-Bolt Cover, 8-Bolt Ring Gear 
The AMC Model 20 uses a 12-bolt cover pattern alongside an 8-bolt ring gear — the two counts differ, which can cause confusion when cross-referencing specs. This gasket is built to the AMC Model 20's 12-bolt cover pattern specifically. A worn, crushed, or damaged cover gasket is one of the most common causes of gear oil seepage at the rear axle — this fiber gasket helps restore a consistent seal on AMC and Jeep builds running the Model 20.

COMPATIBLE WITH
AMC MODEL 20 / JEEP CORPORATE 12-BOLT DIFFERENTIAL COVER APPLICATIONS
• Fits AMC Model 20 (Jeep Corporate 12-Bolt) rear axle housings using the factory 12-bolt differential cover pattern.
• Compatible with OE and aftermarket differential covers designed for the AMC Model 20 rear axle.
• Verify axle identification before installation, as many Jeep models were available with Dana axle options.

COMMON VEHICLE APPLICATIONS
Jeep CJ-5 (1976-1983)
Jeep CJ-7 (1976-1986)
Jeep CJ-8 Scrambler (1981-1986)
Jeep Cherokee SJ (1981-1984, equipped with AMC Model 20)
Jeep Wagoneer SJ (1981-1984, equipped with AMC Model 20)
Jeep J10 Pickup (1981-1984, equipped with AMC Model 20)
Jeep J20 Pickup (1981-1984, equipped with AMC Model 20)

NOTES
• Fits AMC Model 20 (Jeep Corporate 12-Bolt) rear differentials only.
• Many Jeep models were available with Dana 44 or Dana 60 rear axles. Verify your axle before ordering.
• Does not fit Dana 30, Dana 35, Dana 44, Dana 60, Chrysler 8.25", or Dana 20 transfer cases.
• Confirm cover shape and bolt count before installation.

SPECIFICATIONS
Style: 12-Bolt
Material: Fiber
Quantity: Sold Individually