ATS 309-843-4272 Stage 4 Allison LCT1000 Crate Transmission | 2003-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 PTO 2WD

Features: - Built for 2003-2004 LB7 Duramax trucks - Heavy-duty billet input shaft - Reinforced billet intermediate shaft - Enhanced Five Star torque converter - Deep transmission pan for cooler temps - ATS Co-Pilot controller for shift control - Compatible with 2WD trucks only - Includes PTO (Power Take-Off) provision - Handles increased horsepower and torque - Ideal for towing and performance builds - Improved clutch engagement and durability - Precision-built for long transmission life When You Want Your Duramax To Pull Like A Freight Train If you’re serious about pushing your 2003-2004 LB7 Duramax to its limits, the ATS Stage 4 Allison LCT1000 Crate Transmission is the kind of upgrade that makes your truck feel unstoppable. Designed specifically for 2WD Silverado and Sierra 2500HD/3500HD models, this package transforms your transmission into a towing and performance powerhouse. It’s built to handle heavy loads, long hauls, and everything in between, giving you the confidence to tow big and drive hard without second-guessing your drivetrain. The Five Star torque converter boosts low-end torque and improves throttle response, making everyday driving feel more responsive and controlled. You’ll also notice smoother gear shifts and better clutch engagement thanks to the Co-Pilot Transmission Controller, which optimizes shift timing under load. Whether you’re hauling equipment, pulling a trailer up a steep grade, or just want more confidence under your right foot, this transmission package keeps the power flowing. It’s not just a replacement, it’s a serious performance upgrade for diesel owners who expect more from their truck. The Transmission Built To Handle Serious Power Under the surface, the ATS Stage 4 Allison LCT1000 is packed with performance-driven components built to take abuse. The billet input and intermediate shafts are engineered to resist twisting and shearing under high torque, making them ideal for trucks that see heavy towing or added horsepower. Its deep transmission pan not only increases fluid capacity but also improves cooling, which helps reduce transmission temperatures during long hauls or aggressive driving. The included ATS Five Star torque converter is a multi-disc unit that enhances torque multiplication while maintaining efficient lockup performance. Paired with the ATS Co-Pilot Transmission Controller, this setup ensures consistent line pressure and shift quality whether you're empty or fully loaded. Built for 2WD models with a PTO provision, this transmission is ready for work applications that demand durability and consistent output. Everything in this package has been fine-tuned for the LB7 Duramax platform from 2003 to early 2004, giving you a direct-fit solution with serious upgrades inside. It's a fully built transmission system you can count on when factory parts just don’t cut it anymore. Fits: 2003, 2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 PTO 2WD Notes: - Designed specifically for 2003-2004 6.6L LB7 Duramax - Fits GM Silverado/Sierra 2500HD and 3500HD 2WD models - Transmission includes PTO (Power Take-Off) provision - Only compatible with 2WD trucks, not 4WD - Shipping surcharge of $500 added at checkout - Professional installation is strongly recommended - Includes ATS Co-Pilot for enhanced shift control - Core charge may apply depending on vendor terms - Transmission built to handle increased power levels - Must match production date range for proper fitment - Includes upgraded internal shafts for durability - Ideal for performance applications and heavy towing