Allison C4 Clutch Pack

Features:

• Direct replacement for Allison C4 clutch pack
• Compatible with LB7, LLY, and LBZ engines
• Designed for heavy-duty diesel applications
• Improves transmission reliability and performance
• Crafted by ATS for precise OEM fit
• Delivers smooth and efficient power transfer
• Built to handle towing and hauling loads
• Ideal for both daily driving and work trucks
• Simple installation for pros and DIYers
• Withstands high heat and tough conditions
• Made in the USA with premium materials

C4 Clutch Pack Replacement for Allison Transmission

When you start pushing your Allison transmission harder—whether it’s through towing, tuning, or just everyday heavy use—the stock clutch components can quickly become a weak point. That’s where the ATS Allison C4 Clutch Pack steps in. Purpose-built for the 2001–2010 GM 6.6L Duramax, this clutch pack is designed to meet the demands of real-world diesel performance, not just factory specs. This isn't your average replacement kit. ATS engineers these C4 clutch packs to handle serious abuse, making them a solid choice for anyone who expects more out of their transmission. Whether you’re hauling a fifth-wheel, running big power, or just want the peace of mind that comes with upgraded internals, this clutch pack is up to the task. It drops right into your transmission as a direct replacement, meaning you don’t need to modify anything to get a serious bump in reliability and performance.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax