6 Speed Allison Conversion
Posted on 24 May 2015
We are excited to offer the Suncoast 5 to 6 Speed Allison conversion! Owners of 2001-2004 5 speed Allison transmissions can now enjoy that extra gear and lower rpm's while cruising. The 6 speed Allison conversion is easier than you think. The kit includes a re-programmed TCM and Suncoast custom 6 speed valve body. There's no wiring or modifications required to gain that extra gear. Simply swap the TCM, install the valve body and enjoy a 375 rpm drop at 75 mph (with 3.73 gears).
Overhauling your Allison provides a great time to do the conversion. Not only will you have a stronger transmission but also an extra gear for fuel savings. Street Diesel Power offers a complete selection of Allison rebuild kits, billet shafts, deep pans, controllers and torque converters for 2001-2015 Allison transmissions.
View the 6 Speed Allison Conversion!