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See Special Tools. 5. Install the J 7872-3 (4) to the J 8001-3 (3). See Special Tools. 6. Place the contact pad of the J 7872-3 (4) onto one of the teeth of the pinion gear closest to the locking differential side gear. Preload the dial of the J 8001-3 approximately 3/4 of a turn clockwise. See Special 7. Tighten the lock nut of the J 7872-2 (2) finger tight. 8. Turn the dial of the J 8001-3 until the needle and the dial face indicate ZERO. See Special Tools. 9. Pull the pinion gear firmly into the differential case seat. 10. Rotate the pinion gear back and forth. 11. Measure the backlash. Specification: The backlash between the locking differential side gear and the pinion 10. If the backlash is too large, disassemble the differential, install the next larger size side gear thrust washer, re-assemble the differential and recheck the backlash. 11. If the backlash is too small, disassemble the differential, install next smaller size side gear thrust washer, re-assemble the differential and recheck the backlash. Differential side gear thrust washers are available in the following sizes: Washer Sizes: 19.05 mm (0.750 in) 20.32 mm (0.800 in) 21.59 mm (0.850 in) 22.86 mm (0.900 in) 24.13 mm (0.950 in) 25.40 mm (1.000 in) 26.67 mm (1.050 in) 27.94 mm (1.100 in) 29.21 mm (1.150 in) 30.48 mm (1.200 in)
2007 Hummer H3 2007 Driveline/Axle Rear Drive Axle - H3
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