Lct1000 6 Speed Stage 4 Transmission Package

Features:

• Supports over 1000 horsepower applications
• Includes ATS Extreme LCT1000 6-speed transmission
• Equipped with proprietary internal modifications
• ATS TripleLok torque converter for power transfer
• Billet flex plate enhances drivetrain durability
• ATS CoPilot controller improves shift performance
• Extra deep pan increases fluid capacity and cooling
• Built specifically for 2006–2007 8.1L 2WD GM trucks
• Designed for 2500HD and 3500HD light-duty platforms
• Ideal for high-horsepower gas engine builds
• Improves drivability under load and in performance use
• Complete Stage 4 upgrade package in one system

Make Your Big Block Build Unstoppable With Confidence

If you’re running a 2006–2007 GM 8.1L 2WD truck and looking to push serious power without blowing out your transmission, the ATS Stage 4 LCT1000 package is your ticket to worry-free performance. This is not your run-of-the-mill rebuild, it's a purpose-built system engineered to handle 1000+ horsepower while keeping drivability smooth and streetable. Whether you're hauling heavy loads, ripping up the strip, or just want your gas-powered HD to feel bulletproof, this transmission is the foundation you’ve been waiting for. With the ATS Extreme 6-speed transmission at the core, you're also getting a TripleLok torque converter for firm and precise lockup, plus a billet flex plate to handle the added stress of big torque. The extra deep pan keeps temps in check, even under pressure, and the CoPilot transmission controller sharpens every shift with intelligent control. It’s built to handle abuse but behaves on the street, exactly what you want in a real performance upgrade. If you’ve invested in building a monster 8.1L truck, this is the setup that ensures it all works together.

Purpose Built Transmission System For High Output 8 Point 1 Builds

The ATS 309-998-4308 LCT1000 Stage 4 Transmission Package is a complete performance upgrade for 2006–2007 GM 8.1L gas-powered 2WD 2500HD and 3500HD trucks. This package includes the ATS Extreme LCT1000 6-speed automatic transmission, which features numerous proprietary internal upgrades to improve durability, shift quality, and high-power tolerance. The TripleLok torque converter delivers precise lockup and greater torque multiplication, while the billet flex plate provides added strength at the crank interface. The extra deep transmission pan increases fluid capacity for improved cooling during extended load or performance driving. A standout feature is the ATS CoPilot electronic transmission controller, which enhances shift timing and line pressure for greater control under throttle. This system is engineered to handle over 1000 horsepower, making it ideal for serious street builds, high-performance towing, or weekend track use. Designed specifically for 2WD configurations, this Stage 4 package offers plug-and-play integration with the 8.1L drivetrain and ensures long-term reliability where the stock transmission simply falls short.

Fits:  2006, 2007 GM 2500HD/3500HD 2WD 8.1L Vortec V8

Notes:

• Designed specifically for 2006–2007 GM 2500HD/3500HD trucks with 8.1L gas engines
• Compatible only with 2WD configurations
• Includes ATS Extreme LCT1000 6-speed automatic transmission
• Built to handle 1000+ horsepower applications
• Package includes ATS TripleLok torque converter and billet flex plate
• ATS CoPilot controller enhances shift timing and line pressure
• Extra deep transmission pan improves cooling and fluid capacity
• Ideal for high-power towing, performance builds, or heavy load applications
• All major components are engineered to work as a complete system
• Recommended for enthusiasts needing strength, control, and long-term durability