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There is a split between the 6.9L and 7.3L diesel engines in the late 1980's. Using model years as a guide is usually a good way to judge which transmission you have howeve … read more

If you have a 4 speed manual or 3 speed automatic, swapping in a 5 speed manual is something to seriously consider. The earlier transmissions were tough, but they simply were not designed for the torq … read more

We offer transmission adapters for the following Chevrolet and GMC Transmissions: TH350, TH400, 700R4, 4L60E**, 4L80E, Chevy Allison 1000 5&6 speed automatics **Some 4L60E Transmissions use a 3 … read more

ZF6- Ford started using this transmission design in ’99 and they work well behind the Cummins. They are rated for 520 ft/lbs of torque. Our adapter plate for this transmission uses the Ford 6.0 sta … read more

The 1999-2003 Ford 7.3 Diesel 6-speed works well behind a Cummins engine. Ford started using this transmission in 1999. If your truck did not have one of these transmissions o … read more