Allison 5 To 6 Speed Conversion Kit

Application: 2001-2005 Duramax Allison 1000 Five Speed Automatic Transmissions
Description: For those of you with a 5 speed Duramax looking for the extra gear you are missing, take a look at our 5 to 6 speed conversion kit. This kit is also a good addition if you are taking out your stock transmission out for a rebuild. Adding the extra sixth gear will result in approximately a 350rpm drop at highway speeds, better fuel economy, and less wear and tear on your engine and drive train.
Features:
* Converts 5 speed to a 6 speed transmission
* Kit includes custom TCM and valve body