Find the Shift Enhancements you need to improve the shifting of your 2001-2004 Chevy/GMC 6.6L LB7 Duramax's transmission. By reducing the duration of slip from one gear to the next, a faster shift can help to extend transmission life and enhance torque converter clutch life. Shop today and find top brands like TransGo, XDP, and BD-Power. These Shift Enhancements increase line pressure to make your vehicle shift firmer and quicker. With XDP's Shift Enhancements products, you can improve the shifting of your vehicle's transmission!