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Differential Assembly: Inspection

  1. Drain differential. Remove differential assembly. See DIFFERENTIAL ASSEMBLY  under REMOVAL & INSTALLATION. Using a dial indicator, measure drive pinion runout at a point .39" (10 mm) from end of drive pinion. If runout is greater than .0031" (.079 mm), replace drive pinion and ring gear.
  2. Remove 8 differential carrier cover bolts and differential carrier cover. Use a brass drift to separate cover and carrier. Install differential carrier to an overhaul stand. Using a dial indicator, measure ring gear runout. If ring gear runout is greater than .0020" (.051 mm), replace drive pinion, ring gear and differential case.
  3. Reposition dial indicator and measure ring gear backlash in at least 3 different points. Adjust ring gear backlash if average measurement is not within .0031-.0051" (.079-.130 mm). If the difference between minimum and maximum measurements is greater than .0020" (.051 mm), adjust ring gear backlash.
  4. Using an Oil Cooler Relief Valve Socket (09229-55010) and a torque wrench, measure drive pinion preload using backlash of drive pinion and ring gear. Preload at start should be 4.3-6.9 INCH lbs. (.5-.8 N.m). On vehicles with less than 5000 miles, maximum preload is 16 INCH lbs. (1.8 N.m). Without using backlash from drive pinion and ring gear, total preload is 8.6-13.8 INCH lbs. (1.0-1.6 N.m). If preload is not within specification, disassemble and inspect differential.
  5. Measure pinion gear backlash while holding one side gear toward case. If pinion gear backlash is not within .0020-.0079" (.051-.201 mm), install correct thrust washer. See Figure.
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