Stage 4 Allison LCT1000 Crate Transmission

Features:

• Complete Stage 4 Allison transmission package
• Fits 2004.5-2005 6.6L LLY Duramax 2WD trucks
• Includes ATS Five Star torque converter
• Deep transmission pan improves cooling performance
• ATS Co-Pilot controller enhances shift control
• Billet input and intermediate shafts for strength
• Designed for PTO-equipped truck applications
• Improves durability for towing and power upgrades
• Engineered for Silverado and Sierra HD models
• Supports higher torque and heavy load demands
• $500 shipping surcharge applies at checkout

Restore Strength and Reliability to Your LLY Duramax

If your 2004.5-2005 Silverado or Sierra HD is showing signs of a tired or slipping transmission, the ATS Stage 4 Allison LCT1000 Crate Transmission offers a ready-to-install solution built for serious work. This package is designed specifically for 2WD, PTO-equipped Duramax trucks, giving you the confidence to put your truck back to work without second-guessing your drivetrain. Whether you’re hauling equipment, towing a camper, or stacking performance upgrades under the hood, this transmission is built to handle the demands that come with added torque and heavy loads. It’s fully assembled and ready to drop in, saving you time and taking the guesswork out of choosing the right upgrades.

Complete ATS Package Designed for Real Performance

This transmission isn’t just a replacement—it’s a performance upgrade from start to finish. The ATS Five Star torque converter helps put more power to the ground, giving you better drivability and confidence when pulling heavy loads. The deep transmission pan boosts cooling capacity, helping reduce heat and protect your transmission on long hauls or in stop-and-go conditions. With the ATS Co-Pilot Transmission Controller managing shift timing and pressure, you get smooth, controlled shifting that holds up under pressure. Inside, billet input and intermediate shafts replace factory parts that often fail when the power goes up. Designed to help your LLY-powered truck perform better and last longer, this package is ready for the road ahead. A $500 shipping surcharge applies at checkout.

Fits: 2004.5, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY PTO 2WD