Conversion kit for 1973 to 1979 Jeep CJ 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 457 manual locking hubs.

---

Mile Marker Borg Warner 1339 Quadratrac 4x2 Conversion Kit with 457 CJ 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 specifically for 1973 to 1979 Jeep CJ models equipped with the Borg Warner 1339 transfer case, this kit eliminates constant front axle engagement while preserving drivetrain strength and off-road capability. 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 457 manual locking hubs engineered for CJ applications. By disengaging the front drivetrain during normal driving, the system reduces parasitic drag, decreases component wear, and can improve fuel economy while maintaining full four wheel drive capability when engaged. Precision-machined components and decades of drivetrain engineering experience ensure reliable performance in both restoration and trail environments. Designed for professional installers and serious Jeep enthusiasts, this kit modernizes the Quadratrac system while preserving the rugged character of classic CJ vehicles.

• Converts Quadratrac full-time system to true part-time operation.
• Includes Mile Marker 457 manual locking hubs for CJ applications.
• Uses original stock transfer case chain.
• Designed specifically for 1973 to 1979 Jeep CJ Quadratrac vehicles.

---

Information:

Engineered specifically for Borg Warner 1339 Quadratrac applications in Jeep CJ models; requires proper transfer case disassembly and hub installation procedures to ensure correct operation; professional installation recommended to maintain drivetrain integrity and long-term reliability.

---

Application Summary:

Year	Make/Model
1973-1979	Jeep CJ5
1973-1975	Jeep CJ6
1976-1979	Jeep CJ7
1973	Jeep Commando
1973-1979	Jeep DJ5