Enhance multiple aspects of your ride with the Duramaxtuner 6 Speed conversion kit!
Take your 2001-2005 Allison to another level by adding a sixth gear!
Custom TCM tuning for your specific truck
D...
This transmission is ideal for high-performance vehicles and heavy-duty trucks that require a reliable and durable transmission that can handle high power output. The Stage 2 Allison is built with ...
Randy's Transmissions GM Allison 1000 Stage 3 Transmission 900HP Max
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Raybestos or ALTO G3 C-3 C-...
Dress up your Allison Transmission with our Billet PTO Cover Kit. Complete kit includes covers, gaskets, and button head bolts to give your transmission a clean look.
