Stage 5 Allison LCT1000 Crate Transmission

Features:

• Fits 2004.5-2005 6.6L LLY Duramax 4WD
• PTO-capable Allison LCT1000 transmission included
• ATS Five Star torque converter for strength
• Deep transmission pan improves cooling
• Billet input shaft handles high torque loads
• Includes billet output and intermediate shafts
• ATS Co-Pilot controller for shift precision
• Designed for towing and performance builds
• Reinforced for durability and long-term use
• Complete Stage 5 transmission upgrade package

Built to Handle the Demands of Your Duramax

If you own a 2004.5 to 2005 Silverado or Sierra HD with the 6.6L LLY Duramax and plan to push beyond stock performance, the ATS Stage 5 Allison LCT1000 Crate Transmission is built with your truck in mind. This transmission package is designed for 4WD models equipped with a PTO and comes ready to tackle heavy towing, modified power levels, and hard use. At the core is ATS’s upgraded Allison LCT1000 performance transmission, paired with their Five Star torque converter to deliver smooth power transfer and maximum torque holding. Whether you’re daily driving with confidence or working your truck to its limit, this setup is built to support the extra demand.

Serious Hardware for High-Stress Situations

The transmission includes billet input, output, and intermediate shafts that replace weaker stock components, offering increased durability under load and high horsepower conditions. A deep transmission pan improves fluid cooling and capacity, keeping temperatures in check during heavy use. The included ATS Co-Pilot Transmission Controller gives you more precise control over line pressure and shift strategy, helping to reduce slippage and extend component life. Whether you’re upgrading for longevity or building for performance, this package brings a full set of proven components designed to keep your truck reliable and responsive, even when the work gets tough.

Fits: 2004.5, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY PTO 4WD