Stage 4 Allison LCT1000 Crate Transmission

Features:

• Complete Stage 4 crate transmission assembly
• Built for the Allison LCT1000 platform
• Engineered for heavy-duty towing and hauling
• Supports increased horsepower and torque levels
• Ideal upgrade for high-performance Duramax builds
• Designed for 2017-2019 L5P 6.6L Duramax
• Fits Silverado and Sierra 2500HD/3500HD models
• 4WD compatible for complete drivetrain coverage
• Improves durability over stock transmission
• Optimized for reliable street and work use

Serious Transmission Strength for Serious Duramax Power

If you’ve been stacking power mods on your 2017-2019 Duramax and your stock transmission is starting to feel the pressure, it might be time to step up to the ATS Stage 4 Allison LCT1000 Crate Transmission. Designed specifically for the Silverado and Sierra 2500HD and 3500HD with the 6.6L L5P Duramax, this complete crate transmission is purpose-built to handle the kind of power, torque, and stress that would leave a factory unit begging for mercy. Whether you’re towing heavy equipment, running oversized tires, or laying down extra horsepower with tuning and performance upgrades, this transmission is built to keep up without letting you down.

Built to Work Hard and Keep You Moving

ATS didn’t just build this transmission to survive—they built it to perform. With upgraded internals and enhanced durability throughout, the Stage 4 package is perfect for trucks that live a hard-working lifestyle on the street, the jobsite, or anywhere in between. It’s engineered to improve shift quality, hold more power, and deliver long-lasting reliability even under extreme load. Best of all, it comes ready to install as a complete crate unit, making your upgrade as hassle-free as possible. If you’re looking for the confidence to push your Duramax harder without worrying about the transmission giving up, this is the upgrade that gets it done.

Fits: 2017, 2018, 2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P 4WD

Includes:

• ATS 4WD 2017-2019 Allison LCT1000 Performance Transmission
• ATS Allison LCT1000 Five Star Torque Converter (302-950-4440)
• ATS Allison LCT1000 Deep Transmission Pan (301-900-4248)
• ATS Co-Pilot Transmission Controller (601-924-4440)
• Billet Input Shaft
• Billet Output Shaft
  

Note: $500 Shipping surcharge will be added at checkout