Allison Performance Valve Body

Features:

• Fits 2006–2010 Silverado and Sierra HD
• Designed for 6.6L Duramax engines
• Compatible with LCT1000 6-speed transmission
• Enhances shift speed and consistency
• Improves line pressure and clutch control
• Ideal for towing and performance driving
• Supports increased torque and horsepower
• Built for high-demand diesel applications
• Durable, high-quality construction
• Sold as a complete valve body kit
• Manufactured by ATS Diesel Performance

Better Shifts for Bigger Demands

If you're putting your 2006–2010 Duramax-powered Silverado or Sierra HD to work—whether it's towing, hauling, or running a performance tune—the stock transmission valve body can start to show its limits. The ATS Allison Performance Valve Body is designed to fix that. This direct-fit upgrade is engineered for the LCT1000 6-speed transmission and helps deliver quicker, firmer, and more consistent shifts. It improves the way your transmission responds under load by enhancing line pressure and clutch engagement. That means better control, less slippage, and a more responsive feel behind the wheel, especially when your truck is under stress.

Built for Real-World Performance

This isn’t a flashy add-on. It's a smart upgrade built by ATS Diesel Performance, a company known for durable, proven diesel components. The valve body is built to handle the extra torque and heat that come with tuning, heavy towing, and hard use. It's precision-machined and assembled to ensure tight tolerances, which means reliable performance every time you shift. Whether you’re working your truck daily or building a streetable tow rig, this valve body gives you the confidence that your transmission will keep up. It's a solid foundation for better drivability and long-term durability, and a must-have for anyone serious about getting more out of their Allison.

Fits: 2006, 2007, 2008, 2009, 2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax