Differential Pinion Input Shaft Runout Measurement
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Differential Pinion Input Shaft Runout Measurement
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Special Tools
GE-7872
Magnetic Base Dial Indicator Set , or equivalent
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Note
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This measurement procedure is intended to measure drive axle pinion input shaft runout for systems with a constant velocity (CV) joint, rubber coupling or bolt-on U-joint yoke at the drive axle
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1.
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Place the transmission into NEUTRAL.
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3.
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If equipped with a CV joint, measure the drive axle pinion input shaft radial runout on the splined surface of the prop shaft rear CV joint housing, as close to the flange as possible:
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3.1.
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Clean the surface of the prop shaft rear CV joint housing just ahead of the torque tube input flange.
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3.2.
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Mount a dial indicator set,
GE-7872
Magnetic Base Dial Indicator Set , or equivalent, and position the dial indicator to contact the prop shaft rear CV joint housing as close to the drive axle input flange as possible.
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4.
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If equipped with a rubber coupling or bolt-on U-joint yoke, measure the differential pinion input shaft radial runout on the machined surface of the flange pilot area:
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4.1.
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Mark the position of the prop shaft to the drive axle input flange.
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4.2.
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Separate the propshaft from the drive axle input flange.
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4.3.
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Clean the surface of the flange pilot area.
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4.4.
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Mount a dial indicator set,
GE-7872
Magnetic Base Dial Indicator Set , or equivalent, and position the dial indicator to contact the pilot area as close to the drive axle input flange as possible.
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5.
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If equipped with a torque tube, measure the radial runout on the machined surface of the splined shaft:
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5.1.
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Remove the torque tube assembly from the vehicle.
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5.2.
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Clean the surface of the splined shaft.
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5.3.
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Mount a dial indicator set,
GE-7872
Magnetic Base Dial Indicator Set , or equivalent, and position the dial indicator to contact the machined area as close to the end of the shaft as possible.
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6.
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Rotate the drive axle input shaft by hand to locate the low spot.
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7.
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Set the dial indicator to zero on the low spot.
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8.
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Rotate the shaft by hand and record the amount of radial runout.
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9.
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Compare the runout of the shaft to the runout tolerance specifications guidelines.
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10.
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If the drive axle input shaft runout exceeds the specification, the flange requires replacement.
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