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(24) Push and hold differential case to ring gear side of the axle housing (Fig. 72). (25) Record dial indicator reading (Fig. 72). Add the starting point shim thickness to the dial indica- (26) Subtract 0.003 in. (0.076 mm) from the dial indicator reading to compensate for backlash between (27) Subtract the backlash shim thickness from the total preload shim thickness. The remainder is (28) Rotate dial indicator out of the way on guide stud. (29) Remove differential case and dummy bearings from axle housing. (30) Install side bearings and cups on differential case. (31) Install spreader W-129-B, utilizing some items from Adapter Set 6987, on axle housing and spread (32) Place the required differential bearing preload shims in the axle housing against the axle tubes. (33) Install differential case in axle housing. seat the side bearings. (36) Position the indicator plunger against a ring gear tooth (Fig. 73). (37) Push and hold ring gear upward while not allowing the pinion gear to rotate. (38) Zero dial indicator face to pointer. allowing the pinion gear to rotate. Dial indicator (40) Verify differential case and ring gear runout by measuring ring to pinion gear backlash at eight After the proper backlash is achieved, perform Gear Contact Pattern Analysis procedure. DIFFERENTIAL TOTAL TORQUE TO ROTATE (1) Rotate the pinion a minimum of ten times to seat the differential bearings. Verify that the rotation (2) While rotating the pinion at a slow steady rate, measure the differential total torque to rotate. (3) The differential total torque to rotate must be greater than the pinion torque to rotate plus 3 in.lbs. y differential, the dif- ferential total torque to rotate must be greater than (4) The differential total torque to rotate must be less than the pinion torque to rotate plus 11 in.lbs. y differential, the dif- Fig. 72 Hold Differential Case and Read Dial Indicator 1 – READ DIAL INDICATOR Fig. 73 Ring Gear Backlash Measurement 1 – DIAL INDICATOR 3 - 46 TUBE AND 186 FBI AXLE WJ ADJUSTMENTS (Continued) |