Tools Required
J 7872
Magnetic Base Dial Indicator Set, or equivalent
Important: 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
- Place the transmission in NEUTRAL.
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
.
- 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:
3.1. | Clean the surface of the prop shaft rear CV joint housing just ahead of the torque tube input flange. |
3.2. | Mount a dial indicator set,
J 7872
, 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. |
- 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:
4.1. | Mark the position of the prop shaft to the drive axle input flange. |
4.2. | Separate the propshaft from the drive axle input flange. |
4.3. | Clean the surface of the flange pilot area. |
4.4. | Mount a dial indicator set,
J 7872
, or equivalent, and position the dial indicator to contact the pilot area as close to the drive axle input flange as possible. |
- If equipped with a torque tube, measure the radial runout on the machined surface of the splined shaft:
5.1. | Remove the torque tube assembly from the vehicle. |
5.2. | Clean the surface of the splined shaft. |
5.3. | Mount a dial indicator set,
J 7872
, or equivalent, and position the dial indicator to contact the machined area as close to the end of the shaft as possible. |
- Rotate the drive axle input shaft by hand to locate the low spot.
- Set the dial indicator to zero on the low spot.
- Rotate the shaft by hand and record the amount of radial runout.
- Compare the runout of the shaft to the runout tolerance specifications guidelines.
- If the drive axle input shaft runout exceeds the specification, the flange requires replacement.