ATS 309-842-4272 Stage 4 Allison LCT1000 Crate Transmission | 2003-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 2WD

Features:

• Complete Stage 4 Allison transmission package
• Fits 2003-2004 6.6L LB7 Duramax 2WD trucks
• Includes ATS Five Star torque converter
• Deep pan boosts cooling and fluid capacity
• ATS Co-Pilot controller improves shift quality
• Billet input and intermediate shafts included
• Designed for Silverado and Sierra HD models
• Strengthens drivetrain for heavy towing
• Ideal for performance and work applications
• Improves reliability under added power
• $500 shipping surcharge applies at checkout

Give Your LB7 the Transmission It Deserves

If you’re still running one of GM’s early 2003-2004 LB7 Duramax trucks, chances are you’ve already put it through its paces. While these trucks are known for their reliability, the factory Allison transmission often struggles when you start turning up the power or putting your truck to work with heavy loads. That’s where the ATS Stage 4 Allison LCT1000 Crate Transmission comes in. This complete package is built for 2WD Silverado and Sierra 2500HD and 3500HD models, giving you a serious upgrade that’s ready to take on more torque, more towing, and more miles without hesitation. Fully assembled and ready to install, it’s a direct-fit solution for anyone looking to replace their worn-out stock transmission with something built to last.

Complete Package for Reliable Power Delivery

ATS takes this transmission to the next level with a combination of proven performance upgrades. It features the ATS Five Star torque converter, designed to deliver better throttle response and improved power transfer, especially when your truck is under load. The deep transmission pan increases fluid capacity, helping to keep temperatures in check during hard pulls or long hauls. The included ATS Co-Pilot Transmission Controller fine-tunes shift timing and line pressure, giving you smoother, more reliable performance in real-world driving. Inside the transmission, billet input and intermediate shafts replace the factory’s weak points, ensuring your truck can handle added horsepower without breaking down. Whether you’re towing a trailer or pushing your build to the next level, this package is designed to deliver. A $500 shipping surcharge applies at checkout.

Fits: 2003, 2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 2WD