Sierra Classic 2500 4WD V8-8.1L (2007)
1. Install the oil seal by doing the following:
1. Position the oil seal over the seal bore.
2. Install the J 36366 over the oil seal.
3. Strike the J 36366 with a hammer until the seal flange seats on the axle housing surface.
2. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the splines of the drive pinion yoke.
3. Install the pinion yoke. Align the reference marks made during removal.
4. Notice:
Refer to Pinion Flange/Yoke Installation Notice.
Seat the pinion yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few pinion shaft threads show through the yoke.
5. Install the washer and a new pinion nut.
6. Install the J 8614-01 onto the pinion yoke as shown.
7. Notice:
Refer to Fastener Notice.
Important:
If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
Tighten the pinion nut while holding the J 8614-01.
Tighten the pinion nut until the pinion end play is just taken up. Rotate the pinion while tightening the nut to seat the bearings.
8. Measure the rotating torque of the pinion using an inch-pound torque wrench. Compare the measurement with the rotating torque recorded earlier.
Tighten the pinion nut, in small increments, as needed, until the torque required in order to rotate the pinion is 0.40 - 0.57 Nm (3 - 5 inch lbs.)
greater than the torque recorded during removal.
9. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated. Recheck the rotating torque and adjust if
necessary.
