Sun Coast Allison 5 to 6 Speed Conversion Kit A1-6VB-TCM
Did you ever wish you had one more gear like the newer six speed Allisons? Sun Coast has a five to six speed conversion kit to do just that! This kit will drops 325 engine rpm @ 75 mph with 3.73 gears. Increases fuel economy 1 - 1.5 MPG is possible, and you will see reduced engine noise while cruising. A truck with 3.73 gears that normally likes cruising at 62 MPH will now cruise nice at 72 MPH. That is where the mileage increase comes from, by keeping the engine RPM lower. The gear ratio in your 5 speed is .71 and in 6th gear it will be .61. 6th gear can be disabled with your two haul button and 5th canceled with OD off. This kit consists of a valve body and transmission control module. The transmission does not need to be rebuilt to install this kit.
Note: Price does not include $1200 refundable core charge.
