Conversion kit for 1974 to 1979 Jeep full size vehicles with Borg Warner 1339 Quadratrac transfer cases converting full-time four wheel drive to part-time operation using the stock chain and including Mile Marker 104 Premium hubs.

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Mile Marker Borg Warner 1339 Quadratrac 4x2 Conversion Kit with 104 Premium Hubs delivers a complete solution for converting factory full-time Quadratrac systems into efficient part-time four wheel drive operation while retaining the stock transfer case chain. Designed for 1974 to 1979 Jeep full size vehicles equipped with the Borg Warner 1339 transfer case, this kit eliminates constant front axle engagement while preserving the strength and durability of the original drivetrain. Factory Quadratrac systems operate in full-time mode, keeping the front drivetrain engaged at all times, increasing wear and reducing fuel efficiency. This conversion kit reconfigures the transfer case to allow true part-time operation when paired with included Mile Marker 104 Premium manual locking hubs, giving drivers full control over front axle engagement. By disengaging the front drivetrain during normal driving, the system reduces parasitic drag, decreases component wear, and can improve fuel economy while maintaining full off-road capability when engaged. Engineered with precision-machined components and backed by decades of drivetrain expertise, this kit provides professional installers and restoration builders with a proven modernization solution for classic Jeep applications. Built for durability, efficiency, and long-term reliability, Mile Marker restores control to the Quadratrac system without compromising performance.

• Converts Quadratrac full-time system to true part-time operation.
• Includes Mile Marker 104 Premium manual locking hubs.
• Uses original stock transfer case chain.
• Designed specifically for 1974 to 1979 Jeep full size Quadratrac vehicles.
• Reduces drivetrain wear and parasitic drag.

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Information:

Engineered specifically for Borg Warner 1339 Quadratrac applications only; requires proper installation procedures during transfer case disassembly and hub installation to ensure correct operation; professional installation recommended to maintain drivetrain integrity and long-term performance.

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Application Summary:

Year	Make/Model
1974-1979	Jeep Cherokee
1974-1979	Jeep J10
1974-1979	Jeep J20
1974-1979	Jeep Wagoneer