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(8) Slide the dial indicator probe across the gap between the pinion height block and the arbor bar (9) Select a shim equal to the dial indicator read- ing plus the drive pinion gear depth variance number DIFFERENTIAL BEARING PRELOAD AND GEAR The following must be considered when adjusting bearing preload and gear backlash: • The maximum ring gear backlash variation is 0.003 inch (0.076 mm). • Mark the gears so the same teeth are meshed during all backlash measurements. • Maintain the torque while adjusting the bearing preload and ring gear backlash. • Excessive adjuster torque will introduce a high bearing load and cause premature bearing failure. • Insufficient adjuster torque will not support the ring gear correctly and can cause excessive differen- NOTE: The differential bearing cups will not always • Maintain the gear teeth engaged (meshed) as marked. • The bearings must be seated by rapidly rotating the pinion gear a half turn back and forth. • Do this five to ten times each time the threaded adjusters are adjusted. (1) Use Wrench C-4164 to adjust each threaded adjuster inward until the differential bearing free- (approximately 0.25 mm / 0.01 inch) between the ring and pinion gear. Seat the bearing Fig. 6 Pinion Height Block 1 - PINION BLOCK Fig. 7 Pinion Depth Tools 1 - ARBOR DISC Fig. 8 Pinion Gear Depth Measurement 1 - ARBOR 3 - 86 REAR AXLE - 9 1/4 AN REAR AXLE - 9 1/4 (Continued) |