Grand Cherokee 4WD V8-4.7L (2003)
Seals and Gaskets: Service and Repair
Front Axle - 186FBI
PINION SEAL
REMOVAL
1. Raise and support the vehicle.
2. Remove wheel and tire assemblies.
3. Remove brake rotors and calipers.
4. Mark propeller shaft and pinion companion flange for installation reference.
5. Remove the propeller shaft from the pinion companion flange.
6. Rotate the pinion gear a minimum of ten times and verify the pinion rotates smoothly.
7. Record torque necessary to rotate the pinion gear with a inch pound torque wrench.
8. Using a short piece of pipe and Spanner Wrench 6958 to hold the pinion companion flange and remove the pinion nut and washer.
9. Remove pinion companion flange with Remover C-452 and Flange Wrench C-3281.
10. Remove pinion seal with Remover 7794-A and a slide hammer (Fig. 31).
INSTALLATION
1. Apply a light coating of gear lubricant on the lip of pinion seal. Install seal with an appropriate installer (Fig. 32).
2. Install pinion companion flange on the pinion gear with Installer W-162-D, Cup 8109 and Wrench 6958.
CAUTION: Never exceed the minimum tightening torque 298 Nm (220 ft. lbs.) while installing pinion nut at this point. Damage to collapsible
spacer or bearings may result.
3. Install the pinion washer and a new nut on the pinion gear. Tighten the nut only enough to remove the shaft end play.
CAUTION: Never loosen pinion nut to decrease pinion rotating torque and never exceed specified preload torque. If preload torque or rotating
