ATS 309-814-4332 Stage 1 Allison LCT1000 Crate Transmission | 2007.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM 4WD

Features: - Includes ATS Stage 1 performance transmission - Built for 2007.5–2010 Duramax LMM 4WD trucks - Comes with Five Star torque converter - Includes ATS deep transmission pan - Improves reliability under towing and load - Designed for stock to mildly tuned engines - Upgraded internals for improved torque handling - Reduces heat with increased fluid capacity - Delivers smooth and consistent gear shifts - Built and tested by ATS Diesel in the USA - Ideal for work trucks and daily drivers - Professional installation is strongly recommended When Your Truck Works Hard Your Transmission Should Too Your Duramax LMM is built to haul, pull, and power through whatever job you throw at it, but the factory transmission doesn’t always keep up with your truck’s full potential. That’s where the ATS Stage 1 Allison LCT1000 Transmission comes in. This complete package gives your 2007.5–2010 Silverado or Sierra the backbone it needs to handle heavy loads, aggressive tuning, and long hauls with confidence. Whether you’re towing a fifth wheel across state lines or just looking for a smoother, stronger ride in your daily work truck, this transmission delivers dependable results. It comes with ATS’s Five Star torque converter for better torque transfer and reduced slippage, along with a deep transmission pan that keeps temperatures in check. You get crisper shifts, more consistent power, and a setup that’s built to handle the wear and tear that comes with real work. If you’ve outgrown your factory setup and want a transmission that keeps up with your truck’s purpose, this is the upgrade that makes it happen. A Balanced Upgrade For Strength Cooling And Control The ATS 309-814-4332 Stage 1 Allison LCT1000 Crate Transmission package is engineered to meet the demands of 2007.5–2010 GM 2500HD and 3500HD trucks equipped with the 6.6L Duramax LMM engine and four-wheel drive. At its core is a fully upgraded Allison transmission featuring improved clutch packs and optimized shift strategies to support higher torque from mild performance tuning or consistent towing. The included ATS Five Star torque converter enhances torque multiplication while limiting slippage, delivering better throttle response and more efficient power to the wheels. To further improve reliability, ATS includes its deep transmission pan, which increases fluid capacity and helps manage heat during long hauls or heavy-duty operation. This kit is well-suited for owners who demand durability without jumping to a full race-spec build. Whether you use your truck for hauling equipment, traveling with a trailer, or daily driving with added power, this transmission system brings lasting improvements to drivability and performance. Every component in the package is designed and tested by ATS in the USA to ensure dependable results mile after mile. Fits: 2007, 2008, 2009, 2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM 4WD Notes: - Designed specifically for 2007.5–2010 GM 2500HD and 3500HD trucks with 6.6L Duramax LMM and 4WD. - Includes Stage 1 transmission, Five Star torque converter, and ATS deep transmission pan. - Recommended for stock to moderately tuned engines and light to moderate towing use. - Not intended for high-performance or racing applications. - Professional installation is strongly recommended to ensure proper function and warranty eligibility. - Transmission may produce firmer shifts compared to stock depending on tuning and vehicle setup. - Deep transmission pan helps increase fluid capacity and control heat under load. - Torque converter improves low-end torque and reduces slippage under load. - Verify vehicle fitment using VIN and drivetrain details before purchase. - A $500 shipping surcharge will be added at checkout and is not included in the base price.