REAR AXLE AND SUSPENSION — IRS Type Differential RA31 (e) Select a ring gear teeth side washer of a thickness which eliminates any clearance between the outer race and case. (f) Remove the plate washers and differential case. (g) Install the plate washer into the lower part of the carrier. (h) Place the other plate washer onto the differential case together with the outer race, and install the differential case with the outer race into the carrier. (i) Using a plastic hammer, snug down the washer and bearing by tapping the ring gear. (j) Using a dial indicator, measure the ring gear backlash. Backlash: 0.13 - 0.18 mm (0.0051 - 0.0071 in.)