ATS 309-999-4308 Lct1000 6 Speed Stage 4 Package | 2006-2007 GM 8.1L 4WD

Features:

• Supports over 1000 horsepower capability
• Includes ATS Extreme LCT1000 6-speed transmission
• Equipped with proprietary ATS performance components
• Comes with ATS TripleLok torque converter
• Includes ATS billet flex plate for strength
• ATS CoPilot transmission controller improves shift control
• Extra deep transmission pan for improved cooling
• Built for 2006–2007 8.1L 4WD GM trucks
• Designed for 2500HD and 3500HD applications
• Ideal for high-power towing and performance builds
• Enhanced durability for aggressive driving conditions
• Comprehensive Stage 4 upgrade package

Put Real Power Behind Your 8 Point 1 Build

If you're serious about transforming your 2006–2007 GM 2500HD or 3500HD with the 8.1L engine, the ATS LCT1000 Stage 4 Package is your all-in-one solution to put real power to the ground. This package is more than just a beefed-up transmission, it's a complete performance system designed to handle high-output builds with confidence. With the ATS Extreme LCT1000 6-speed transmission at its core, this setup is engineered to hold over 1000 horsepower, making it perfect for aggressive street builds, towing setups, or high-performance rigs. The included TripleLok torque converter ensures that power delivery is tight and responsive, while the billet flex plate and extra deep pan add durability and cooling for long hauls and heavy loads. The ATS CoPilot controller enhances shift control and driving feel, giving you more authority over how the transmission behaves under pressure. If you’re building a monster 8.1L truck and want a transmission setup that won’t flinch, this Stage 4 package delivers in every category. It's the type of upgrade that turns a capable truck into an unstoppable one.

Engineered To Handle Power Control And Consistency

The ATS 309-999-4308 Stage 4 LCT1000 Transmission Package is built to support demanding applications in 2006–2007 GM trucks equipped with the 8.1L gas engine and 4WD drivetrain. This comprehensive upgrade includes ATS's Extreme LCT1000 6-speed automatic transmission, which features proprietary internal modifications designed for extreme durability and high-performance use. The package includes the ATS TripleLok torque converter for increased torque multiplication and reduced slippage, along with a billet flex plate to handle the added stress from high-horsepower setups. The extra deep transmission pan provides improved cooling capacity, essential for long-term reliability under heavy loads or high-speed conditions. Also included is the ATS CoPilot electronic transmission controller, which gives the driver real-time control over shift timing and pressure, optimizing drivability and transmission longevity. This system is engineered to support well beyond 1000 horsepower, making it an ideal solution for performance applications that demand both strength and precision. From advanced internal upgrades to added cooling and electronic control, this package delivers everything needed to elevate your transmission's performance in serious builds.

Fits: 2006, 2007 GM 8.1L 4WD

Notes:

• Designed for 2006–2007 GM 2500HD/3500HD with 8.1L gas engine
• Compatible only with 4WD configurations
• Transmission package supports 1000+ horsepower applications
• Includes ATS Extreme LCT1000 6-speed automatic transmission
• Comes with ATS TripleLok torque converter for torque control
• Includes ATS billet flex plate for enhanced strength
• ATS CoPilot transmission controller improves shift precision
• Extra deep transmission pan enhances fluid capacity and cooling
• Ideal for high-performance builds and extreme towing demands
• Comprehensive Stage 4 package includes all major upgrade components