Dominate the dirt, gravel, or mud in your 2001-2004 Chevy/GMC 6.6L LB7 Duramax with Differential Carriers & Lockers. Find model-specific components offered for your 1/2-ton, 3/4-ton, or 1-ton truck. Gain traction with spools, limited slip differentials, and rebuild with empty carrier cases, and lockers you need for your vehicle. Find the most popular manufacturers like Yukon Gear & Axle, Nitro Gear & Axle, and USA Standard Gear.