Mile Marker 502 NP203 4x2 Conversion Kit w/104 Hubs

NP203 Transfer Case Conversion Kit with 104 Hubs Ford GM 1/2 Ton Mile Marker NP203 4x2 Conversion Kit with 104 Premium Hubs delivers a complete solution for converting factory full-time New Process 203 transfer cases into efficient part-time four wheel drive systems. Designed for 1973 to 1979 Ford and GM 1/2 ton trucks equipped with the NP203 transfer case, this kit eliminates constant front axle engagement while preserving drivetrain strength and off-road capability. Factory NP203 systems were engineered for full-time operation, keeping the front drivetrain engaged at all times, increasing wear and reducing fuel efficiency. This conversion kit replaces internal differential components, allowing the transfer case to operate in true part-time mode when paired with manual locking hubs. Included Mile Marker 104 Premium manual locking hubs provide durable engagement and reliable front axle control, completing the system for proper operation. By disengaging the front drivetrain during normal driving, this kit reduces unnecessary component wear, decreases parasitic drag, and can improve fuel economy. Engineered with precision-machined components and backed by decades of drivetrain experience, this complete conversion package provides professional installers and restoration builders with a proven upgrade for classic full-size trucks. Built for long-term durability and dependable performance, Mile Marker restores control and efficiency to your drivetrain. Complete NP203 conversion system including 104 manual locking hubs. Converts full-time four wheel drive to true part-time operation. Reduces drivetrain wear and parasitic drag. Includes durable Mile Marker 104 Premium hubs. Improves efficiency while maintaining off-road capability.