Tools Required

J 7872 Magnetic Base Dial Indicator Set, or equivalent

Important: This measurement procedure is intended to measure torque tube runout for systems with a constant velocity (CV) joint, rubber coupling or bolt-on U-joint yoke at the torque tube.

1. Place the transmission in NEUTRAL.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. If equipped with a CV joint, measure the torque tube input flange radial runout on the machined 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 torque tube input flange as possible.

4. If equipped with a rubber coupling or bolt-on U-joint yoke, measure the torque tube input flange radial runout on the machined surface of the flange pilot area:

4.1.	Mark the position of the prop shaft to the torque tube input flange.

4.2.	Separate the propshaft from the torque tube 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 end of the pilot as possible.

5. Rotate the torque tube input flange by hand to locate the low spot.
6. Set the dial indicator to zero on the low spot.
7. Rotate the flange by hand and record the amount of radial runout.
8. Compare the runout of the flange to the runout tolerance specifications guideline.
9. If the torque tube input flange runout exceeds the specification, the flange requires replacement.