Spicer Trac-Lok Limited-Slip Differential Clutch Pack Kit for Jeep AMC Model 20 Rear Axle

Eliminate frustrating rear-end tire slipping, correct aggressive differential chatter, and restore factory-spec dual-wheel traction with this genuine Spicer Trac-Lok Clutch Kit. Specifically packaged as a comprehensive internal rebuild solution for classic Jeep AMC Model 20 rear axles, this premium package replaces the worn friction discs and steel plates inside your factory limited-slip differential (LSD).

On classic Jeep CJ models running the popular AMC Model 20 rear end, the factory Trac-Lok differential relies on a stacked sequence of alternating friction discs and steel plates to distribute engine torque evenly to both rear tires. Over time, continuous trail acceleration, heavy tire leverage, or aggressive off-road use naturally wears away the specialized friction material. When these internal clutches wear down or smooth out, your differential reverts back to operating like a standard open unit—leaving you stranded with a "one-wheel peel" when accelerating on wet pavement, rocks, sand, or loose trail dirt. Conversely, degraded or broken clutch tabs can cause the rear end to bind, chatter, or groan loudly during tight cornering.

This original equipment manufacturer (OEM) restoration package includes a complete, factory-sequenced array of premium multi-lip friction discs and precision-ground steel plates to fully rebuild your Trac-Lok carrier. Sourcing a genuine Spicer component ensures exact original equipment stack thickness, correct splined tab engagement depths, and highly durable friction scoring engineered to work flawlessly with your vehicle’s factory axle shafts and gear oil chemistry.

Installation Note: For optimal performance and quiet operation, always pre-soak the new friction discs in premium limited-slip gear oil additive (friction modifier) for at least 20–30 minutes prior to internal carrier assembly.

Kit Contents:

• Complete Stack of Premium Trac-Lok Friction Discs (Inner Splined)

• Complete Stack of High-Tensile Steel Plates (Outer Tabbed)

Kit Highlights:

• Restores Positraction Power: Re-establishes correct spring-loaded preload friction limits inside the carrier, ensuring power transfers seamlessly to both tires instead of spinning a single wheel.

• Genuine Spicer OEM Engineering: Formulated by the premier original equipment drivetrain supplier to match exact factory thickness tolerances and structural steel tempering limits.

• Cures Turning Chatter: Replaces warped plates or stripped friction discs to eliminate binding, popping, and groaning noises during low-speed cornering maneuvers.

• Heavy-Duty Friction Compounds: Utilizes advanced, high-coefficient wear materials designed to withstand immense torsional heat build-up from off-road rock crawling and large tire leverage.

Vehicle & Axle Fitment:

• Axle Profile: Solid Rear AMC Model 20 (AMC 20) Axles equipped with a round differential cover and factory Trac-Lok limited-slip differentials. Does not fit standard open differentials.

• Jeep CJ5: 1976, 1977, 1978, 1979, 1980, 1981, 1982, and 1983 models.

• Jeep CJ7: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, and 1986 models.

• Jeep CJ8 Scrambler: 1981, 1982, 1983, 1984, and 1985 models.

• Full-Size Jeep (FSJ): Select 1970s–1980s Wagoneer, Cherokee, and J-Series pickups equipped with the AMC 20 rear axle option.

• Position: Rear Differential Center Housing Pumpkin — Internal Carrier Assembly