Find the Shift Enhancements products you need to improve the shifting of the transmission in your 1989-1993 Dodge 5.9L Diesel. Shop today and find top brands like TransGo, XDP, and BD-Power. 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. These Shift Enhancements add greater line pressure to your vehicle's valve body, making shifts firmer and faster. Improve the shifting of the transmission in your vehicle with the Shift Enhancements products from XDP!