Rear Axle - 198RBI

PINION SEAL

REMOVAL
1. Raise and support the vehicle.
2. Remove wheel and tire assemblies.
3. Remove brake calipers and rotors.
4. Mark propeller shaft and pinion yoke for installation reference.
5. Remove propeller shaft from the yoke.
6. Rotate pinion gear a minimum of ten times and verify pinion rotates smoothly.
7. Record rotating torque of the pinion gear with an inch pound dial-type torque wrench, for installation reference.





8. Hold the pinion yoke with Spanner Wrench 6958 and remove the pinion nut and washer (Fig. 31).





9. Remove pinion yoke with Remover C-452 and Wrench C-3281 (Fig. 32).





10. Remove pinion gear seal with Remover 7794-A and slide hammer (Fig. 33).

INSTALLATION





1. Apply a light coating of gear lubricant on the lip of pinion seal and install seal with an appropriate installer (Fig. 34).





2. Install yoke on pinion gear with Screw 8112, Cup 8109 and Spanner Wrench 6958 (Fig. 35).

CAUTION: Do not exceed the minimum tightening torque 271 Nm (200 ft. lbs.) when installing the pinion yoke at this point. Damage to the collapsible spacer or bearings may result.

3. Install yoke washer and a new nut on the pinion gear and tighten the nut until there is zero bearing end-play.
4. Tighten the nut to 271 Nm (200 ft. lbs.).

CAUTION: Never loosen pinion gear nut to decrease pinion rotating torque and never exceed specified preload torque. If preload torque or rotating torque is exceeded a new collapsible spacer must be installed.





5. Rotate the pinion gear a minimum of ten times and verify pinion rotates smoothly. Rotate pinion shaft an inch pound torque wrench. Rotating torque should be equal to recorded reading plus an additional 0.56 Nm (5 in. lbs.) (Fig. 36).





6. If the rotating torque is low, use Spanner Wrench 6958 to hold the pinion yoke (Fig. 37), and tighten the pinion nut in 6.8 Nm (5 ft. lbs.) increments until the proper rotating torque is achieved.

CAUTION: If maximum tightening torque is reached prior to reaching required rotating torque, the collapsible spacer may have been damaged. Replace the collapsible spacer.

7. Install the propeller shaft with reference marks aligned.
8. Add gear lubricant to the differential if necessary.
9. Install brake rotors and calipers.
10. Install wheel and tire assemblies.
11. Lower the vehicle.