Setting Pinion Bearing Preload

INSTALL OR CONNECT
^ Tools Required:
- J 6133-01 Pinion Bearing Installer
- J 25273 Pinion Seal Installer

1. Appropriate pinion selective shim on the pinion gear shaft.





2. Inner pinion bearing on the pinion gear shaft using J 6133-01. Place the pinion gear on a hydraulic press and install the inner pinion bearing on the pinion gear shaft with the tapered side facing away from the pinion gear. Then, place the J 6133-01 on the pinion shaft and slowly press the inner pinion bearing into place.
3. New collapsible spacer on the pinion gear shaft with the short shank toward the pinion gear.





4. Outer pinion bearing and pinion gear into differential carrier.





5. New pinion oil seal into differential carrier using J 25273.
6. Apply wheel bearing lubricant to the new pinion oil seal lip.
7. Pinion flange onto pinion gear; secure with pinion flange nut. Do not tighten fully.

Important: Use caution not to overtighten the pinion flange nut when adjusting bearing preload. Frighten the pinion flange nut gradually while taking frequent pinion bearing preload measurements with a torque wrench. If the pinion flange nut is overtightened, the collapsible spacer will crush requiring a new collapsible spacer before pinion bearing preload can be properly adjusted.

Adjust
^ Tool Required:
- J 8614-01 Flange Holder

^ Pinion bearing preload using J 8614-01 to hold the pinion flange stationary while tightening the pinion flange nut. Tighten the nut gradually in increments of 5 Nm (44 inch lbs.). Between each increment of tightening, remove the J 8614-01, rotate the pinion gear 5 revolutions in order to ensure pinion bearing seating and measure pinion bearing preload.

Measure





- Pinion bearing preload using a torque wrench. The pinion gear should require 1.2 Nm (11 inch lbs.) of torque in order to rotate. If pinion bearing preload is less than specified, repeat the adjustment procedure until proper pinion bearing preload has been attained.

8. Stake the pinion flange nut.
9. Differential side bearing races onto the differential side bearings.





10. Differential assembly into the differential carrier.
11. Both side bearing adjusters into differential carrier.
12. Both side bearing caps onto differential carrier; secure with four side bearing cap bolts.

Important: Make sure the right and left side bearing caps are in their correct positions according to the marks scribed during disassembly. The left side bearing cap is on the ring gear side of the carrier. The right side bearing cap is on the Pinion side of the carrier.

- Tighten differential side bearing cap bolts to 100 Nm (72 ft. lbs.).