Pinion Installation

- J 35512 Bearing Installer (4WD 15 Series and 4WD 25 Series Models)
- J 36614 Bearing Installer (4WD 35 Series Model)
- J 8614-01 Pinion Flange Remover
- J 36366 Seal Installer





1. Install the shim to the pinion gear. Use the proper size shim.
2. For the 4WD 15 Series and 4WD 25 Series models, use the J 35512 or the J 35512.
3. Install the new spacer onto the pinion gear.





4. Install the bearing into the case.
5. Install the seal into the case using the J 36366.
6. Install the pinion gear, with the bearing and the spacer, to the case.





7. Install the deflector, the flange, the washer and the nut using the following procedure:
^ Apply PST Sealant GM P/N 1052080 or the equivalent, to the pinion gear threads and on both sides of the washer.
^ Tighten the nut until no end play is detectable while holding the flange with the J 8614-01.
^ No further tightening should be attempted until the bearing preload has been checked.





8. Measure the pinion bearing preload.
8.1. Use an inch-pound torque wrench.
The correct preload is 1.7 - 2.8 Nm (15 - 25 inch lbs.).
8.2. Rotate the pinion with the torque wrench and note the reading.
8.3. If the preload torque is below specifications, continue torquing the pinion nut in small increments. Check the preload after each tightening.
Each tightening will increase the bearing preload by several inch pounds.
If the bearing preload is exceeded, the pinion will have to be removed, and a new collapsible spacer installed.
8.4. Once the preload has been obtained, rotate the pinion several times in order to ensure the bearings are seated.
8.5. Recheck the preload, and adjust as necessary.