Chevy & GMC 2500 & 3500 Allison Transmission Rebuild Kits

While the Allison transmission in your 3500, 4500, or 5500 Silverado or Sierra may be a "heavier duty" transmission than those found on the 2500s, when you start stacking big-time horsepower and torque from potent Duramax tuning and performance modifications, it can start to let you down. Tier One's Allison transmission rebuild kits give your stock Allison 1000 or 10L1000 an overhaul while allowing it to handle more power and tougher applications than stock. Our Allison rebuild kits come with all the key upgraded components to handle more power, as well as everything you need to get smooth shifting and reliable operation for years to come. Tier One's Allison transmission rebuild kits are a great choice for heavy towing, sled pulling, drag racing, and rough off-roading with huge tires. Also check out our other GM transmission rebuild kits or our built Allison transmissions! Contact Tier One with questions or for custom builds!