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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Drive Axle - 7.5" Ring Gear Differentials >> Ring Gear & Differential Case RUNOUT Checking Procedure >> Ring Gear RUNOUT

Ring Gear RUNOUT

NOTE: Check ring gear runout before disassembling differential assembly.
  1. Assemble dial indicator on differential housing assembly with tip of dial indicator contacting back face of ring gear.
    NOTE: A space is provided between exciter ring and ring gear for measuring ring gear runout.
  2. Adjust dial indicator to zero. Rotate ring gear and note ring gear runout. Maximum ring gear runout is .004" (.10 mm). If ring gear runout exceeds .004" (.10 mm), check for improper tightening on ring gear bolts or foreign material between ring gear and differential case.
  3. If ring gear runout still exceeds .004" (.10 mm), check for warped ring gear, worn differential bearings or warped differential case by checking differential case runout. See DIFFERENTIAL CASE RUNOUT  .
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