ACDelco Allison 1000 C4 Clutch Drum

Professional-grade C4 clutch drum assembly for the Allison 1000 series automatic transmission in Duramax-equipped GM HD trucks. This ACDelco C4 drum is manufactured to Allison specifications for reliable performance under heavy towing and commercial use conditions. The Allison 1000 demands quality hard parts to maintain its legendary durability.

Compatible with 2001-2019 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD with Duramax 6.6L diesel. Precision-machined for exact fitment. Trusted by professional Allison rebuilders and diesel performance shops.