Pinion Depth Adjustment

Pinion Depth Adjustment

Tools Required
^ J36601 Pinion Shim Selector
^ J29763 Static Timing Gage

Important: Make sure all of the tools, the pinion bearings, and the pinion bearing cups are clean before proceeding.

1. Lubricate the pinion bearings with axle lubricant. Use the proper fluid.





2. Assemble the J29763 (5) to the J36601-4 (4) and J36601-7 (1).
3. Assemble the J21777-35 (3) onto the J36601-7 (1).
4. Install the pinion bearings and hold them in place.
5. Insert the J36601-7 (1) with the J21777-35 (3) through the pinion bearings.
6. Install the J36601-5 (2), the washer, and the nut to the J36601-7 (1).
7. While holding the J36601-4 (4) stationary, install an inch-pound torque wrench on the nut and
tighten the nut until a rotating torque of 1.1 - 2.3 Nm (10 - 20 inch lbs.) is obtained.
Rotate the assembly several times in both directions in order to seat the pinion bearings.
8. Check the rotating torque of the assembly. If the torque is less than 10 Nm (10 inch lbs.), tighten the nut on the J36601-7 until a rotating torque of 1.1 - 2.3 Nm (10 - 20 inch lbs.) is obtained.

Important: The left side differential bearing adjuster assembly must be removed prior to placing the J36601-4 in the differential side bearing bore.





9. Adjust the J29763 (2) to the differential bearing bore as follows:
9.1. Loosen the lock nut on the J29763.
9.2. Place the contact pad of the J36601 on the differential side bearing bore.
9.3. With the contact pad of the J36601 touching the differential side bearing bore, push down on the J29763 until the needle of the J29763 has turned 3/4 of a turn clockwise
9.4. Tighten the lock nut of the J29763.
10. Rotate the J36601 (1) back and forth until the needle of the J29763 (2) indicates the lowest point in the differential side bearing bore.
11. At the lowest point of deflection move the housing of the J29763 until the needle indicates ZERO.
12. Move the J36601 back and forth again to verify the zero setting. Adjust the housing of the J29763 as necessary to set the needle to ZERO.





13. After the ZERO setting is obtained and verified, grasp the J36601 (1) by the flats and move the J36601 out of the differential side bearing bore.

Important: The unit of measurement for the J29763 is in hundredths of a millimeter.

14. The value indicated on the J29763 (2) is the thickness of the shim needed in order to set the depth of the pinion.
15. Select the shim that indicates the proper thickness. Measure the shim with a micrometer in order to verify that the thickness is correct.
16. Remove the pinion depth setting tools.
17. Remove the pinion bearings.
18. Install the pinion shim between the pinion and the inner pinion bearing and assemble the differential carrier.





Differential pinion gear shims are available in these sizes: