With the races in place over the bearings, the differential is set into position in the gearcase. Next, the spanner nuts are carefully placed into their threads on either side of the differential bearing races. The main caps are also threaded to allow the spanner nuts to travel in or out in their bore as required. The main caps are tightened to 85-95 ft-lb. A dial indicator is used to check backlash. A setting of 0.008 to 0.012 inch is desired. Backlash is adjusted by moving the differential to the left or right within the gearcase, using the spanner nuts, relative to the pinion gear. Our initial reading was 0.005 inch.