
Twisted Street™ Ford Diesel C6 Transmission 450HP
Fits 1983–1991 Ford F-250 / F-350 6.9L & 7.3L IDI Diesel
(C6 3-Speed Automatic Transmission)
The Twisted Street™ Ford Diesel C6 is a heavy-duty OEM+ stock replacement built for daily driving, towing, work trucks, and classic diesel Ford applications.
Every unit is completely disassembled, cleaned, inspected, and rebuilt to correct common C6 wear points while restoring proper hydraulic pressure, shift quality, and long-term durability behind diesel torque.
Ideal for:
• Daily-driven diesel trucks
• Work trucks
• Towing and hauling
• Farm and off-road applications
• Long-distance driving
✔️ Twisted Torque™ HD Clutches and Steels
✔️ Heavy-Duty Intermediate Band
✔️ New Bushings and Bearings
✔️ Updated Sprag Assembly
✔️ Premium Seals and Gaskets
✔️ New Filter
✔️ Updated Sealing Rings
✔️ Proper clutch clearances set during assembly
Modified & Updated the Twisted Torque™ Way
✔️ Diesel-specific valve body calibration
✔️ Improved shift timing and consistency
✔️ Increased line pressure stability
✔️ Reduced clutch slip and flare
Modified & Updated the Twisted Torque™ Way
✔️ Pump fully inspected and recalibrated
✔️ Updated pressure regulation
✔️ Restores proper hydraulic performance under load
• Low-stall diesel towing converter included
• Calibrated for diesel torque delivery
Recommended Stall:
1600–1800 RPM
Ideal for towing, hauling, and daily driving.
Rated for applications up to 450 horsepower
Perfect for:
• Stock diesel trucks
• Daily drivers
• Work vehicles
• Light towing applications
$500 Refundable Core Charge
Core must be rebuildable. Refund issued once returned.
Freight shipping available nationwide and worldwide
• Commercial dock delivery recommended
• Residential delivery available
• Freight terminal pickup available
Each transmission is built for your specific application.
We confirm vehicle setup, towing usage, tire size, and overall build before final assembly to ensure proper fitment and performance.
Questions? Need help choosing the right build?
833-858-9612