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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 740 (Vibration Symptoms Diagnosis And Correction) >> Diagnostic Information and Procedures >> Differential Pinion Input Shaft Runout Measurement >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

J 7872 Magnetic Base Dial Indicator Set, or equivalent. See Special Tools and Equipment  .

  1. Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  2. Remove the torque tube assembly from the vehicle. Refer to Torque Tube Assembly in Differential.
  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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