1980–86 Ford C6-to-T18 Swap Guide

Swapping from a C6 automatic to a T18 manual transmission is a solid choice for durability and control. Here’s a rundown of what you’ll need and consider:

Parts Required

1. T18 Transmission:

   • Make sure it’s in good condition. Check for any worn gears or syncros.

2. Clutch Assembly:

   • You’ll need the clutch disc, pressure plate, and release bearing compatible with the T18.

3. Flywheel:

   • The flywheel from a manual transmission setup. It must match your engine’s balance (either internally or externally balanced).

4. Bellhousing:

   • A bellhousing that fits both your engine and the T18.

5. Clutch Pedal Assembly:

   • This includes the clutch pedal and any associated linkage or hydraulic components, depending on your setup.

6. Clutch Linkage or Hydraulic System:

   • If your truck uses a mechanical linkage, make sure everything is intact. For hydraulic systems, ensure the master and slave cylinders are in good shape.

7. Driveshaft:

   • You might need to modify the length, as the T18 can be a different length than the C6.

8. Crossmember and Mount:

   • Check if the crossmember needs adjustment or if a new mount is necessary.

9. Shifter and Boot:

   • A T18 shifter with a boot to seal the cab.

10. Floor Pan Cover:

    • You might need to modify the floor pan or get a cover for the new shifter location.

Additional Considerations

• Starter: Ensure the starter is compatible with the manual flywheel.
• Transmission Cooler: You can remove the C6’s cooler if you’re not using it elsewhere.
• Wiring: It might be necessary to change or bypass the neutral safety switch wiring.
• Gear Ratios: Be prepared for the different gear ratios. The T18 has a very low first gear, which is great for torque but may take some getting used to.

Pro Tips

• Match the Transmission to the Engine: Make sure your flywheel and clutch are the correct size for the engine you’re working with.
• Documentation: Keep track of all parts and take photos during disassembly for easier reassembly.
• Community: Check out resources like the Bullnose Ford subreddit or the Bullnose Garage channel for more insights and community help.

Swapping transmissions can be a rewarding project that improves your truck’s capability and driving experience. Good luck, and feel free to reach out with more questions!