GMC 1989 Light Duty Truck Repair Manual page 281

T TRUCK FRONT AXLE 4C3-11
J 3 3 7 8 8
* F-01791
Figure 23— Installing the Sleeve Bearing
6. Turn the left adjusting sleeve IN one notch using
F-01781
J 33792.
7. Rotate the pinion several times to seat the bearings.
Figure 24— Adjusting the Sleeve
8. Install J 34047, J 25025-1 and J 8001-1 (figure 27).
9. Place the indicator stem at the heel end of a tooth.
Figure 2 2 — M easuring Pinion B earing Preload