American Powertrain TREMEC Magnum 6-Speed 26-Spline .50OD Kit F-100 1961-1979

This combo kit (COFO-T1J) revitalizes the transmission capabilities of your vintage 1961–1979 F-100. It offers better highway drivability and less fatigue while cruising. This kit provides a modern muscle upgrade and features a .63 overdrive and 26-spline input. It delivers up to 50% better fuel economy, reduced engine wear, and a smoother, quieter ride. Paired with the White Lightning mid-shifter, you'll experience precise, confident shifting no matter where you take your ride.

Features and Benefits:
- Low RPM cruising for greatly reduced driver fatigue
- Improved highway driving experience
- 30–50% better fuel economy
- .50 overdrive for low-RPM cruising
- Quieter, smoother drivetrain operation
- Reduces engine strain and heat
- White Lightning mid-shifter for precise shifting
- Bolt-in crossmember uses factory holes
- Includes driveshaft slip yoke and hardware

Kit Includes:
- Magnum 6-speed transmission
- White Lightning mid-shifter setup
- Driveshaft slip yoke (shorter driveshaft required)
- Adjustable bolt-in cross member (black powder coat, uses original bolt holes)
- Isolator mount (polyurethane)
- Speedometer solution (mechanical or electronic)
- Conversion pilot bearing
- Weather seal reverse light harness
- Hardware and complete instructions

Vehicle Fitment:
- 1961-1979 F-100s

Please Note: A 26-spline clutch disc is required.