ATS 309-824-4440 Stage 2 Allison LCT1000 Crate Transmission | 2017-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P 4WD

Features:

• Fits 2017–2019 Silverado and Sierra HD 4WD trucks
• Designed for 6.6L Duramax L5P engine
• Includes ATS-built Allison LCT1000 transmission
• Features ATS Five Star torque converter
• Comes with deep transmission pan for cooling
• ATS Co-Pilot controller enhances shift control
• Built to handle increased power and towing demands
• Improves torque capacity and heat dissipation
• Ideal for towing, performance, and reliability
• Fully assembled crate transmission package
• Plug-and-play installation with no tuning required
• $500 shipping surcharge applied at checkout

Get More From Your L5P Without Holding Back Power

If you're putting your 2017 to 2019 Duramax to work and want a transmission that can keep up with your upgrades, the ATS Stage 2 Allison LCT1000 Crate Transmission is exactly what your truck has been missing. Built to handle the kind of stress your stock unit was never designed for, this package gives you serious capability for towing, hauling, or simply pushing your truck harder than the factory ever intended. It includes a fully rebuilt Allison LCT1000 transmission built for performance, a Five Star torque converter that locks up strong under load, and an extra deep pan to keep things running cool when the work gets heavy. With the ATS Co-Pilot controller included, shift strategies are smarter and torque management is tighter, so you can enjoy smooth, confident performance whether you’re on the highway or off the beaten path. There’s no guesswork or extra tuning needed, just install and go. This isn’t just a replacement, it’s an upgrade that transforms how your truck drives, tows, and holds power. If you’ve invested in tuning or added horsepower, don’t let a weak transmission be the weak link.

Designed For Duramax Owners Who Demand More Than Stock

The ATS 309-824-4440 Stage 2 Transmission Package is a complete crate solution engineered for 2017 to 2019 Silverado and Sierra 2500HD or 3500HD trucks equipped with the 6.6L Duramax L5P and 4WD drivetrain. At the core of this package is the ATS-modified Allison LCT1000 5-speed transmission, which is internally upgraded to support greater torque loads and deliver long-term reliability under high-stress driving. The included ATS Five Star torque converter improves power transfer and torque multiplication, helping reduce slippage and boost responsiveness. The deep transmission pan not only increases fluid capacity but also helps manage heat, which is critical for both daily towing and heavy-load applications. To optimize control, the package also comes with the ATS Co-Pilot transmission controller, which manages line pressure, shift timing, and converter lockup based on driving conditions. Installation is designed to be straightforward, with no tuning or additional modifications required. Built for those who rely on their trucks every day, this transmission system delivers both the strength and intelligence needed to keep up with modern performance demands.

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

Notes:

• Fits 2017–2019 Silverado and Sierra 2500HD/3500HD 4WD models
• Designed for 6.6L Duramax L5P engine applications
• Includes ATS-built Stage 2 Allison LCT1000 transmission
• Comes with ATS Five Star torque converter
• Includes ATS deep transmission pan for improved cooling
• ATS Co-Pilot controller included for optimized shifting
• No custom tuning or reprogramming required
• Ideal for towing, hauling, and high-performance applications
• Transmission arrives fully assembled and ready to install
• Professional installation is highly recommended
• $500 shipping surcharge will be applied at checkout