ATS 309-815-4272 Stage 1 Allison LCT1000 Crate Transmission | 2003-2004 GM 2500HD/3500HD 6.6L Duramax LB7 PTO 4WD

Features:

• Fits 2003–2004 GM 2500HD/3500HD 4WD
• Designed for 6.6L Duramax LB7 with PTO
• Includes ATS Stage 1 LCT1000 transmission
• Five Star torque converter for improved lock-up
• Deep transmission pan increases fluid capacity
• Enhanced durability for towing and heavy use
• Smoother shifts and better throttle response
• Built for long-term reliability and performance

A Dependable Upgrade for Work-Ready Duramax Builds

If you're running a 2003–2004 GM 2500HD or 3500HD with a 6.6L Duramax LB7 and PTO, chances are your truck works just as hard as you do. The ATS Stage 1 Allison LCT1000 Crate Transmission is designed for trucks like yours—rigs that tow, haul, and see daily use under real-world conditions. This transmission isn’t built for the track; it’s built for longevity, smoother shifts, and improved performance while keeping your factory feel intact. Whether you’re running a utility bed, flatbed, or plow setup, this Stage 1 package offers a noticeable upgrade in how your truck handles torque, especially under load or in stop-and-go traffic. It’s a smart move for any owner looking to replace or upgrade their factory transmission without overbuilding for their application.

Smarter Shifting, Better Cooling, and More Control

This package includes ATS’s trusted Five Star torque converter, designed to lock up tighter and transfer more power to the wheels with less slippage—especially helpful when towing or climbing grades. The deep transmission pan increases fluid capacity and cooling, which goes a long way in extending transmission life during hot summer months or under heavy work conditions. The internals of this transmission are upgraded for better holding power, while maintaining smooth, predictable shifting that doesn't sacrifice drivability. With ATS’s reputation for quality engineering and long-haul reliability, this Stage 1 transmission is a perfect fit for truck owners who expect their drivetrain to keep up with their lifestyle—day after day, mile after mile.

Fits: 2003, 2004 GM 2500HD/3500HD 6.6L Duramax LB7 PTO 4WD

Includes:

• ATS 4WD w/ PTO 2003- Early 2004 Allison LCT1000 Performance Transmission
• ATS Allison LCT1000 Five Star Torque Converter (302-950-4248)
• ATS Allison LCT1000 Deep Transmission Pan (301-900-4248)

Note: $500 Shipping surcharge will be added at checkout