8 1/4 Axle
The ring and pinion gears are serviced in a matched set. Do not replace the pinion gear without replacing the ring gear.REMOVAL
1. Remove differential from the axle housing.
2. Mark pinion yoke and propeller shaft for installation alignment.
3. Disconnect propeller shaft from pinion yoke. Using suitable wire, tie propeller shaft to underbody.
4. Using Yoke Holder 6719 to hold yoke and remove the pinion yoke nut and washer.
Pinion Yoke Removal:
5. Using Remover C-452, remove the pinion yoke from pinion shaft.
6. Partially install pinion nut onto pinion to protect the threads.
Remove Pinion Gear:
7. Remove the pinion gear from housing. Catch the pinion with your hand to prevent it from falling and being damaged.
8. Remove the pinion shaft seal with suitable pry tool or slide-hammer mounted screw.
9. Remove oil slinger, if equipped, and front pinion bearing.
Front Bearing Cup Removal:
10. Remove the front pinion bearing cup with Remover C-4345 and Handle C-4171.
Rear Bearing Cup Removal:
11. Remove the rear bearing cup from housing. Use Remover C-4307 and Handle C-4171.
Collapsible Spacer:
12. Remove the collapsible preload spacer.
Rear Bearing Removal:
13. Remove the rear bearing from the pinion with Puller/Press C-293-PA and Adapters C-29347.
Place 4 adapter blocks so they do not damage the bearing cage.
14. Remove the depth shims from the pinion gear shaft. Record the thickness of the depth shims.
INSTALLATION
1. Apply Mopar"R" Door Ease, or equivalent, stick lubricant to outside surface of bearing cup.
Pinion Rear Bearing Cup Installation:
2. Install the pinion rear bearing cup with Installer C-4308 and Driver Handle C-4171.
3. Ensure cup is correctly seated.
4. Apply Mopar"R" Door Ease, or equivalent, stick lubricant to outside surface of bearing cup.
Pinion Front Bearing Cup Installation:
5. Install the pinion front bearing cup with Installer D-130 and Handle C-4171.
6. Install pinion front bearing, and oil slinger, if equipped.
Pinion Seal Installation:
7. Apply a light coating of gear lubricant on the lip of pinion seal. Install seal with Installer C-4076-B and Handle C-4735-1.
NOTE: Pinion depth shims are placed between the rear pinion bearing cone and pinion gear to achieve proper ring and pinion gear mesh. It the factory installed ring and pinion gears are reused, the pinion depth shim should not require replacement. If required, refer to Pinion Gear Depth to select the proper thickness shim before installing rear pinion bearing.
8. Place the proper thickness depth shim on the pinion gear.
Shaft Rear Bearing Installation:
9. Install the rear bearing and slinger, if equipped, on the pinion gear with Installer 6448.
Collapsible Preload Spacer:
10. Install a new collapsible preload spacer on pinion shaft and install pinion gear in housing.
11. Install pinion gear in housing.
12. Install yoke with Installer C-3718 and Yoke Holder 6719.
13. Install the yoke washer and a new nut on the pinion gear and tighten the pinion nut until there is zero bearing end-play. It will not be possible at this point to achieve zero bearing end-play if a new collapsible spacer was installed.
14. Tighten the nut to 285 Nm (210 ft. lbs.).
CAUTION: Never loosen pinion gear nut to decrease pinion gear bearing rotating torque and never exceed specified preload torque. If preload torque or rotating torque is exceeded a new collapsible spacer must be installed. The torque sequence will then have to be repeated.
15. Using Yoke Holder 6719, crush collapsible spacer until bearing end play is taken up.
Check Pinion Gear Rotating Torque:
16. Slowly tighten the nut in 6.8 Nm (5 ft. lbs.) increments until the desired rotating torque is achieved. Measure the rotating torque frequently to avoid over crushing the collapsible spacer.
17. Check bearing rotating torque with an inch pound torque wrench. The torque necessary to rotate the pinion gear should be:
- Original Bearings - 1 to 3 Nm (10 to 20 inch lbs.).
- New Bearings - 2 to 5 Nm (15 to 35 inch lbs.).
18. Install propeller shaft.
19. Install differential in housing.