Allison Transmission Rebuild Kits

Whether your Allison has had a hard life doing truck things or if you want to add some serious power to your Silverado or Sierra build, a Tier One Allison transmission rebuild kit is your winning ticket. These awesome Allison transmission overhaul kits come with everything you need to win your Allison A1000 transmission back reliable operation and proper function, while also giving you the ability to add some serious power and torque onto your Silverado or Sierra 2500 or 3500 build. Our Allison transmission rebuild kits come with a mix of aftermarket performance hardware and new OEM components that work together to give your tough HD Silverado or Sierra back excellent shifting, more reliable operation, and better power-holding than stock. Tier One's Allison rebuild kits can help your truck handle extremely heavy towing, aggressive off-roading, and tough use at the drag strip or sled pull. Also check out our complete Allison transmissions or our Allison valve bodies!