ATS 309-814-4362 Stage 1 Allison LCT1000 Crate Transmission | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML 4WD

Features:

• Includes ATS Stage 1 performance transmission
• Built for 2011–2016 Duramax LML 4WD trucks
• Comes with ATS Five Star torque converter
• Deep transmission pan for improved cooling
• Supports mild performance and towing upgrades
• Upgraded internals for better torque handling
• Improves shift quality and transmission life
• Reduces transmission temps during heavy use
• Perfect for daily driven and work-ready trucks
• Designed for GM 2500HD and 3500HD models
• Built and tested in the USA by ATS Diesel
• Professional installation is strongly recommended

Confidence Comes Standard With Every Shift You Make

If your LML Duramax is doing more than just daily driving, chances are your factory transmission is starting to feel the strain. The ATS Stage 1 Allison LCT1000 Crate Transmission is the upgrade that bridges the gap between stock durability and real-world performance needs. Whether you are towing heavy trailers, climbing mountain passes, or running mild tuning, this transmission package delivers the strength and confidence to back it all up. You get the complete setup, including ATS’s proven Five Star torque converter and a deep transmission pan that helps manage heat when the load gets heavy. The shifts are crisp, the power transfer is clean, and the reliability speaks for itself. It’s a perfect fit for truck owners who expect more but still want everyday drivability. If you are looking for a transmission that is ready to work as hard as your truck does, this one checks all the boxes.

Designed To Improve Torque Handling And Cooling Efficiency

The ATS 309-814-4362 Stage 1 Transmission package is engineered to improve the durability and performance of 2011–2016 GM 2500HD and 3500HD trucks equipped with the 6.6L Duramax LML engine and four-wheel drive. The core of the kit is the upgraded Allison LCT1000 transmission, which features refined shift strategies and stronger internal components designed to manage increased torque from towing or mild tuning. The included ATS Five Star torque converter is built to reduce slippage and increase torque multiplication, offering more efficient power delivery under load. A deep transmission pan expands fluid capacity and enhances cooling, which helps control temperatures during extended towing or heavy driving. This setup supports both stock and lightly modified power levels, making it a practical and dependable choice for those who rely on their trucks for work and travel. Each component in this package is built and tested by ATS Diesel to ensure long-term reliability and consistent performance. It is a true upgrade that strengthens one of your truck’s most critical systems.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML 4WD

Notes:

• Specifically designed for 2011–2016 GM 2500HD and 3500HD trucks with 6.6L Duramax LML and 4WD configuration.
• Includes upgraded ATS Stage 1 transmission, Five Star torque converter, and deep transmission pan.
• Intended for stock to mildly modified engines and moderate towing use.
• Professional installation is highly recommended for best results and warranty coverage.
• Transmission may produce firmer shifts compared to stock depending on tuning and driving conditions.
• ATS Five Star torque converter is designed to reduce slippage and improve towing performance.
• Deep transmission pan increases fluid capacity to help control transmission temperatures.
• Built and tested in the USA by ATS Diesel for quality and durability.
• Verify vehicle fitment using VIN and drivetrain details before purchasing.
• $500 shipping surcharge will be added at checkout; total cost may vary.