ATS 304-930-4248 Allison Billet Output Shaft | 2001-2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Fits 2001–2010 GM 2500HD and 3500HD trucks
• Designed for 6.6L Duramax with Allison LCT-1000
• Compatible with 4WD configurations only
• Made from high-strength billet steel
• Handles extreme torque and power levels
• Ideal for performance and towing builds
• Improves drivetrain durability and reliability
• Reduces risk of shaft failure under load
• Precision machined for perfect OEM fitment
• Sold individually as a direct replacement
• Essential upgrade for built transmissions

Put Big Power To The Ground Without Breaking A Sweat

When you're building a Duramax-powered rig that’s pushing serious torque, you can’t afford weak links in your drivetrain. The ATS 304-930-4248 Billet Output Shaft is the upgrade your Allison LCT-1000 transmission needs to keep up with your truck’s potential. Whether you're towing heavy loads through mountain passes or launching hard at the track, this shaft is built to handle the kind of abuse that would snap a stock unit. It’s crafted from billet steel to drastically improve strength and reliability over OEM shafts, giving you peace of mind when the power gets real. If you’ve already upgraded your clutches, converter, and internals, this is the piece that ties it all together. It ensures your transmission can reliably transfer power to the wheels without twisting or breaking under pressure. For Duramax owners running 2001–2010 4WD Silverado or Sierra HDs, this is a smart investment that protects everything you've already built.

Billet Construction Designed To Withstand Maximum Torque Loads

The ATS 304-930-4248 Output Shaft is precision machined from high-grade billet steel and engineered specifically for use with the Allison LCT-1000 transmission in 4WD GM 2500HD and 3500HD trucks from 2001–2010. This shaft is a significant structural upgrade over cast or OEM components, designed to maintain integrity under extreme torque and high-stress conditions. As the output shaft is one of the most common failure points in high-power transmission builds, upgrading to a billet version dramatically improves long-term durability. It’s the ideal match for performance-built transmissions and trucks used in heavy towing, drag racing, or sled pulling. The shaft offers exact OEM fitment, so there are no surprises during installation, and no custom modifications required. By distributing torque more evenly and resisting flex under load, it helps ensure smoother operation and reduced risk of drivetrain failure. For serious Duramax builds relying on the strength of their driveline, this output shaft is a critical component for overall reliability and performance.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Designed for 2001–2010 GM 2500HD and 3500HD 4WD trucks with 6.6L Duramax engines.
• Compatible only with Allison LCT-1000 transmissions.
• Constructed from high-strength billet steel for maximum durability.
• Recommended for high-performance or heavy towing applications.
• Ideal upgrade for built or reinforced transmissions.
• Reduces the risk of shaft twisting or breakage under load.
• Sold individually—ensure correct quantity is ordered for your build.
• Professional installation is recommended due to drivetrain disassembly requirements.
• Does not include additional transmission components—shaft only.
• Engineered and manufactured by ATS Diesel for strength and precision.