Pinion Gear/Ring Gear - Installation

INSTALLATION

Special Tools:














1. Install new front pinion bearing cup with Installer (1) and Handle (2).





2. Install new rear pinion bearing cup with Installer (1) and Handle (2).





3. Install pinion depth shim (1) on the pinion gear shaft (2).





4. Install rear pinion bearing (4) on pinion (3) with Installer MD998805 (2) and a press (1).





5. Install new collapsible spacer (1) on pinion gear (2).





6. Lubricate pinion and bearings.
7. Install pinion into housing (2) and place front pinion bearing onto the pinion shaft. Draw pinion shaft into the front bearing with Installer (1).





8. Install new pinion seal with Installer (2) and Handle (1).





9. Apply a light coat of teflon sealant to the pinion flange splines.
10. Hold the pinion and lightly tap the pinion flange onto the pinion, until a few threads are showing.
11. Install pinion flange washer and new pinion nut.
12. Hold pinion flange (2) with Flange Wrench (1) and tighten pinion nut until pinion end play is taken up.





13. Rotate pinion several times to seat pinion bearings.
14. Measure Pinion Torque To Rotate (1) with an inch pound torque wrench (2). Tighten pinion nut in 6.8 Nm (5 ft. lbs.) increments until pinion torque to rotate is achieved.Pinion Torque To Rotate is:

- New Pinion Bearings: 1.7 - 2.8 Nm (15 - 25 in. lbs.)
- Original Pinion Bearings: 1.1 - 2.2 Nm (10 - 20 in. lbs.)

15. Rotate pinion several times then verify pinion torque to rotate again.





16. Position ring gear (2) on differential case (4) and start two new ring gear bolts.
17. Install the rest of the new ring gear bolts and tighten them alternately to seat the ring gear.
18. Torque ring gear bolts to 237 Nm (175 ft. lbs.).





19. If exciter ring was removed, position differential assembly on differential Plug and place exciter ring on the differential case.
20. Install exciter ring (1) on the differential case evenly with a hammer and brass punch (2). Drive the ring down until it is seated against the ring gear (3).

CAUTION: Do not damage exciter ring teeth during installation.

21. Install differential into the housing.
22. Measure Total Torque to Rotate (TTTR) with an inch pound torque wrench.Total Torque To Rotate is:

- New Bearings: 3.4 - 5.6 Nm (30 - 50 in. lbs.)
- Original Bearings: 2.8 - 5.1 Nm (25 - 45 in. lbs.)
NOTE: If TTTR is to high back off adjusters evenly on both sides slightly and check TTTR again. If TTTR is to low tighten adjusters evenly on both sides slightly and check TTTR again.

23. Verify ring gear backlash and gear contact pattern.