ATS 309-812-4248 Stage 1 Allison LCT1000 Crate Transmission | 2001-2002 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax 2WD

Features:

• Includes ATS Stage 1 performance transmission
• Fits 2001–2002 Duramax LB7 2WD trucks
• Comes with ATS Five Star torque converter
• Includes ATS deep transmission pan
• Supports towing and daily driving needs
• Ideal for stock or mildly tuned engines
• Upgraded internals for improved torque capacity
• Deep pan increases fluid volume and cooling
• Delivers smoother and more responsive shifts
• Enhances reliability under moderate load use
• Built and tested in the USA by ATS Diesel
• Professional installation is strongly recommended

Give Your LB7 The Transmission It Was Meant To Have

If you’re still running your original LB7 transmission and it’s starting to feel a little tired, now’s the perfect time to step up to something built for more. The ATS Stage 1 Allison LCT1000 Crate Transmission is designed to replace your factory unit with something far more capable, without turning your truck into a full-on race build. Whether you’re towing your trailer on weekends, relying on your truck for daily hauling, or simply want peace of mind behind the wheel, this package is a smart and reliable solution. It comes complete with the ATS Five Star torque converter for improved power delivery and reduced slippage, and a deep pan to help manage transmission temps under stress. The result is a transmission that shifts smoother, holds stronger, and works harder. If your 2001–2002 Silverado or Sierra is built to do real work, this upgrade will keep you rolling with confidence. It’s a straightforward fix that brings serious value to your truck.

Balanced Performance And Cooling For Everyday Towing Demands

The ATS 309-812-4248 Stage 1 Transmission package is tailored specifically for 2001–2002 GM 2500HD and 3500HD trucks equipped with the 6.6L Duramax LB7 and a two-wheel drive configuration. This system includes a performance-tuned Allison LCT1000 transmission, designed with upgraded clutch packs and reinforced internal components to support moderate tuning and regular towing applications. ATS pairs it with their Five Star torque converter, which enhances low-end torque response and limits slippage when power demands increase. The package also features a deep transmission pan that increases fluid volume, promoting better cooling and longer service life, especially under sustained load. This combination provides a noticeable improvement in drivability, gear engagement, and long-haul reliability. Built and tested in the USA, this system reflects ATS’s commitment to delivering solutions that work in real trucks under real conditions. For LB7 owners who want a dependable upgrade that handles more without sacrificing everyday comfort, this transmission hits the mark.

Fits: 2001, 2002 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax 2WD

Notes:

• Engineered for 2001–2002 GM 2500HD and 3500HD trucks with 6.6L Duramax LB7 engines and 2WD drivetrain.
• Package includes ATS Stage 1 transmission, Five Star torque converter, and deep transmission pan.
• Recommended for trucks used in towing, hauling, and general work applications with stock or mildly tuned engines.
• Not intended for extreme horsepower builds or racing applications.
• Torque converter helps improve low-end torque and reduces power loss from slippage under load.
• Deep pan increases fluid capacity and helps maintain cooler transmission temperatures during heavy use.
• May shift firmer than the factory transmission depending on driving style and setup.
• Professional installation is highly recommended to ensure proper alignment, torque specs, and warranty coverage.
• Transmission is built and tested in the USA by ATS Diesel for durability and consistent quality.
• $500 shipping surcharge will be added at checkout and is not included in the listed price.