RA-30 REAR AXLE AND SUSPENSION - IRS Type Differential 2. INSTALL DIFFERENTIAL CASE IN CARRIER (a) Place the bearing outer races on their respective bearings. Make sure the left and right outer races are not interchanged. (b) Install the differential case in the carrier. 3. ADJUST RING GEAR BACKLASH (a) Install only the plate washer on the ring gear back side. NOTE: Insure that the ring gear has a backlash. (b) Snug down the washer and bearing by tapping on the ring gear with a plastic hammer. (c) Hold the side bearing boss on the teeth surface of the ring gear and measure the backlash. Backlash (reference): 0.10 mm (0.0039 in.) (d) Select a ring gear back plate washer using the backlash as reference. (See page RA-32)