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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 896 (Vibration Symptoms Diagnosis And Correction) >> Diagnostic Information & Procedures >> Differential Pinion Input Shaft Runout Measurement >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

J 7872 Magnetic Base Dial Indicator Set, or equivalent

  1. Raise and suitably support the vehicle. Refer to JACKING AND LIFTING - AZTEK & RENDEZVOUS .
  2. Remove the torque tube assembly from the vehicle. Refer to TORQUE TUBE ASSEMBLY in Rear Drive Axle.
  3. Clean the surface of the first 25 mm (1 in) of the differential pinion input shaft splines from the end of the shaft.
  4. Mount a dial indicator set, J 7872, or equivalent, and position the dial indicator to contact the differential pinion input shaft splines approximately 13 mm (1/2 in) from the end of the shaft.
  5. Rotate the differential pinion input shaft by hand to locate the low spot.
  6. Set the dial indicator to zero on the low spot.
  7. Rotate the differential pinion input shaft by hand and record the amount of radial runout.
  8. Compare the runout of the differential pinion input shaft to the following specification:

    Specification 

    Differential pinion input shaft maximum allowable runout 0.05 mm (0.002 in).

  9. If the differential pinion input shaft runout exceeds the specification, the differential pinion assembly requires replacement.
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