Drive Pinion Shim Selection
Drive Pinion Shim Selection- J 35664 Pinion Shaft Bearing Installer
- J 44856 Pinion Depth Shim Selector
- J 44861 Pinion Inner Bearing Race Installer
- J 44864 Pinion Nut Wrench
- J 44865 Spline Socket
- J 44869 Assembly Holding Fixture
Notice: Inspect the press bar surface. Do not press the housing against a rough surface. Sealing surfaces could be damaged.
1. Using the axle lube, lightly lubricate the bearing cup. Place J44861 inside the race. Using a press, install the race.
2. Inspect the race to ensure it is properly seated.
Notice: If dowel pins are still in the housing, remove them before pressing. Pressing on dowels will damage the housing.
3. Using the axle lube, lightly lubricate the bearing race. Place J 44861 inside the race. Using a press, install the race.
4. Install J 44856-2, J 44856-3 and J 44856-4 on the pinion bearings (1) as shown.
Notice: Refer to Fastener Notice in Cautions and Notices.
Important: Lightly lubricate the bearing rollers with the axle lube.
5. Hold the shaft and tighten.
- Tighten the shaft nut to 1.7 Nm (15 inch lbs.) rolling torque.
6. Rotate the stud assembly while inspecting the rolling torque.
7. Turn the housing over so that J 44856-3 (1) is up.
8. Install J 44856-5 (2) on the J 44856-1 (3) and place it in the differential bearing bores.
9. Install the J 44856-9 over the master bearings using 2 (M10) rear cover bolts and snug tighten the bolts.
10. Install the dial indicator on the arbor post.
11. Rotate J 44856-1 so that the gage pin is not in contact with the J 44856-3 and zero the dial indicator.
12. Lift the gage Pin and rotate J 44856-1. Drop the gage pin onto J 44856-3.
13. Rock the arbor back and forth slightly and record the maximum reading from the dial indicator.
- Subtract this measurement from 2.54 mm (0.100 inch). This equals the shim thickness.
14. Remove the pinion shimming tools.
15. Using J 35664, position the pinion shaft (3) into a press. Install the determined shim (2) and bearing (1) on the shaft.
16. Install the pinion shaft (4), the new collapsible spacer (3), and the bearing (1) into the differential housing (2).
Notice: Do not over-press the bearing on the shaft. This could pre-crush the collapsible spacer.
Important: The rear face of the pinion shaft must be supported in order to install the pinion shaft and bearing.
17. Position the pinion shaft and the differential housing into a press in order to press the bearing on the shaft using J 35664.
18. Install the differential housing on the J44869 using 4 clutch cover bolts (1). Attach the housing and fixture to a bench.
Important: The pinion nut is left-hand threaded.
19. Install a new pinion nut on the pinion shaft. Place the J 44864 (1) over the pinion shaft (1). Turn the pinion shaft by hand to align the hex nut and the J 44864 to the flats of the J 44869 (2).
20. Place J 44865 (1) and the breaker bar over the splines on the pinion shaft.
21. Tighten the nut in the left-handed direction in small increments, as needed, to apply bearing preload.
22. Remove J 44864. Place the J 44865 on a needle type torque wrench. Rotate the shaft, inspecting the rolling torque.
- Tighten the shaft to 1.7 Nm (15 inch lbs.).
23. When the rolling torque is reached, use a punch to stake the nut on the pinion shaft flats.