American Powertrain TKX Pro-Fit 5-Speed 26-Spline .81OD Kit W/Offset F-100 61-79

This combo kit (COFO-T1CX) revitalizes the transmission capabilities of your classic 1961–1979 F-100. The 5-speed TKX transmission provides enhanced performance, efficiency, and drivability. This bolt-in solution features a closed-ratio TKX transmission with a 0.81 overdrive. It offers 30–50% better fuel economy, reduced engine wear, and lower cruising RPMs. The 2.25” offset shifter ensures ergonomic placement for comfortable shifting.

Features and Benefits:
- Closed Ratio: 1st 2.87, 2nd 1.89, 3rd 1.28, 4th 1.00, 0.81 5th
- Provides excellent street and highway drivability
- 30–50% better fuel economy
- 0.72 overdrive for reduced RPMs
- 2.25” AP Revolution shifter offset
- Reduces noise, vibration, and harshness
- Extends engine life with lower wear
- Cooler engine operating temperatures
- Bolt-in crossmember uses factory holes
- Includes driveshaft slip yoke and hardware
- Durable polyurethane isolator mount
- Mechanical or electronic speedometer options

Kit Includes:
- TREMEC TKX 5-speed transmission
- 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.