Differential Side Bearings Assemble
Differential Side Bearings Assemble^ Tools Required
- J 42155 Differential Lifting Tool
- J 42168-1 Differential Centerline Cylinder
- J 42168-2 Shim Gage Assembly
- J 42168-7 Depth Gage
- J 42168-9 Holding Strap
- J 42168-11 Pinion Housing Centering Spacer
- J 42168-13 Gage Plate Assembly
- J 42168-15 Side Bearing Shim Selector
- J 42168-16 Spacers
- J 42170 Bearing and Race Installer
- J 42173 Differential Holding Fixture
1. Remove the J 42168-9 and thumbscrew from the J 42168- 1.
2. Remove the J 42168-1 from the left bearing race bore of the differential housing.
Important: Level the tool in order to obtain accurate measurements.
3. Install the J 42168-13 into a vice.
4. Position the bearing race (104) onto the J 42168-13.
5. Use the J 42173 in order to position the differential case (1) onto the J 42168-13 and into the bearing race (104). Rotate the differential, in both directions, in order to seat the bearing to the race.
6. Install the J 42168-7 (2) into the hole in J 42168-2 (1). Loosen the thumbscrew and allow the rod to contact the bottom of the bearing race bore, machined surface (3).
7. Tighten the thumbscrew.
8. Remove the J 42168-7 from the J 42168-2.
9. Install the J 42168-7 (2) into one of the two oil passages of the differential (1). The tapered portion of the tool will wedge and be retained into the differential.
10. Rotate the differential until the rod of J 42168-7 is above the J 42168-13 (3) gage block.
11. The J 42168-13 upper gage block location (1) is used when servicing 2.73 and 2.93 ratio differentials. The lower gage block location (2) is used when servicing the 3.15 and 3.42 ratio differentials.
12. Using a feeler gage, measure the distance between the rod of J 42168-7 and the gage block of J 42168-13. Record the measurement as dimension C1.
13. Subtract C1 value from a C nominal value of 5 mm (0.197 inch). Record that calculation as C2.
Refer to the applicable calculation table in Spacer and Shim Specifications.
14. Locate the A2 value (2) on the side of the ring gear.
Important: The A2 value is a manufacturing variation between the ring gear and pinion. The A2 value may be higher, lower, or equal to 74.5 mm (2.93 inch), 2.93 ratio differential, nominal value. When subtracting the D nominal value from the A2 value, the C3 calculation may compute to a positive, negative, or zero total.
15. Subtract the D nominal value of 74.5 mm (2.93 inch) from the A2 value. Record the calculation as C3.
16. Add the C2 value to the C3 value for the proper left side differential bearing shim thickness. The C3 value may be a positive, negative, or zero value.
17. Select shims equal to the calculated value. It may be necessary to round the shim or shims total to obtain the proper shim sizes. If the shim thickness calculation is past the midpoint value, round the number to the next decimal value.
18. Remove the pinion housing/cage bolts (1).
19. Remove the pinion housing/cage (4) from the differential.
20. Remove the J 42168-11 (3 and 6), spacer (5), and J 42168-2 (7) from the pinion housing/cage (4).
21. Use the J 42170 and a hydraulic press in order to install the selected shims (103) and bearing race (104) to the differential housing.
22. Install the differential assembly (1) onto the J 42173 (2).
Notice: Refer to Fastener Notice in Service Precautions.
23. Install 4 M8 x 1.25 bolts (3).
^ Tighten the bolts to 28 Nm (20 ft. lbs.).
24. Use the J 42155 in order to install the differential case into the differential housing.
25. Install the right side bearing race (104), and the J 42168-15 onto the differential.
Important: In order to perform the shim selection procedure:
^ The oil seal must be removed from the cover - right.
^ The pinion housing/cage must NOT be installed to the differential case.
26. Install the cover - right (3) and J 42168-16 bolts (1) and spacers (2) to the differential. Position the J 42168-16 bolts and spacers evenly apart.
^ Tighten the bolts to 28 Nm (20 ft. lbs.).
27. Insert a feeler gage into the J 42168-15 and measure the gap. The measured dimension is the right side differential bearing shim size.
28. Remove the bolts (1), cover (3), and tools.
29. Install the selected shim (103) and bearing race (1104) to the cover - right.
30. Install the shim or shims and bearing race into the cover - right using the J 42170 and a hydraulic press.