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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!

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