ATS 309-814-4248 Stage 1 Allison LCT1000 Crate Transmission | 2001-2002 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 4WD

Features:

• Includes ATS Stage 1 performance transmission
• Built for 2001–2002 Duramax LB7 4WD trucks
• Comes with Five Star torque converter
• Includes ATS deep transmission pan
• Enhances shift quality and power delivery
• Ideal for stock to mildly tuned engines
• Improves towing reliability and drivability
• Reduces heat with increased fluid capacity
• Upgraded internals handle added torque loads
• Perfect for daily drivers and work trucks
• Built and tested in the USA by ATS Diesel
• Professional installation is highly recommended

Give Your Early Duramax The Strength It Deserves

If your LB7-powered truck is still putting in work but your transmission is starting to show its age, now is the perfect time to bring it back stronger than ever. The ATS Stage 1 Allison LCT1000 Crate Transmission is designed to breathe new life into your 2001–2002 Silverado or Sierra with improved durability, smoother shifts, and better control under load. Whether you’re towing on the weekends or daily driving with confidence, this package gives you the reliability and performance your truck needs to keep up. It includes ATS’s Five Star torque converter, which helps get more power to the wheels and reduces unnecessary slippage, making the most of every bit of torque your Duramax puts down. You also get a deep transmission pan to help keep temperatures in check and extend the life of your fluid and components. This upgrade is perfect for owners who want real-world improvements without going overboard. If you’re looking to restore your transmission and gain peace of mind in the process, this is the setup that gets it done right.

A Practical Transmission Upgrade For Towing And Longevity

The ATS 309-814-4248 Stage 1 Crate Transmission is specifically engineered for 2001–2002 GM 2500HD and 3500HD trucks with the 6.6L Duramax LB7 and four-wheel drive. It includes a performance-enhanced Allison LCT1000 transmission, paired with ATS’s Five Star torque converter and a deep transmission pan for a complete drivetrain upgrade. The internal components are strengthened to manage increased torque from mild tuning or consistent towing, while the shift strategy is refined for both smoother engagement and improved responsiveness. The Five Star converter is designed to improve torque multiplication, minimize slippage, and deliver better acceleration under load. The deep transmission pan increases fluid capacity, which helps regulate temperature and promotes longer transmission life, especially during heavy-duty use. This package is a great fit for trucks that see daily work, weekend hauling, or light performance upgrades. Built and tested by ATS in the USA, each unit is crafted for dependable, real-world results that help your LB7 handle the demands of modern driving without compromise.

Fits: 2001, 2002 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 4WD

Notes:

• Specifically designed for 2001–2002 GM 2500HD and 3500HD trucks with the 6.6L Duramax LB7 engine and 4WD.
• Package includes ATS Stage 1 transmission, Five Star torque converter, and deep transmission pan.
• Recommended for trucks with stock to mildly tuned engines and moderate towing needs.
• Not intended for extreme horsepower builds or race applications.
• Professional installation is strongly recommended for proper fitment and warranty support.
• Torque converter improves efficiency and reduces slippage under load.
• Deep pan increases fluid capacity for improved cooling and longevity.
• Transmission may have firmer shifts compared to factory units.
• Units are assembled and tested in the USA by ATS Diesel Performance.
• $500 shipping surcharge will be applied at checkout and is not included in the listed product price.