The Ford 8.8- and 9-inch need to be rebuilt after extensive use and need a variety of different ratios for top performance and special applications. This Workbench book provides detailed step-by-step photos and information for rebuilding the differentials with the best equipment and installing the gear sets and converting to posi-traction for a variety of applications. It shows how to disassemble the rear end, identify worn ring and pinion gears and other damage or wear, and proceeds to show step-by-step rebuilding of the differential. It also explains how to select the right differential hardware, bearings, seals, and other parts, as well as how to set ring and pinion backlash, so the rear end operates at peak efficiency.