REMOVAL & INSTALLATION
See Figures 1, 2 and 3
- Raise and safely support the vehicle securely on jackstands.
- Scribe a mark on the universal joint, pinion yoke, and pinion shaft for installation reference.
- Disconnect the propeller shaft from the pinion yoke.
- Secure the propeller shaft in an upright position to prevent damage to the rear universal joint.
- Remove the wheel and tire assemblies.
- Remove the brake drums to prevent any drag. The drag may cause a false bearing rotating torque measurement.
- Rotate the pinion yoke three or four times.
- Measure the amount of torque necessary to rotate the pinion gear with a inch pound dial-type torque wrench. Record the torque reading for installation reference.
- Hold the yoke in position with a pipe wrench or other suitable tool. Remove the pinion shaft nut and washer.
- Remove the yoke.
- Remove the pinion shaft seal with suitable prytool or slide-hammer mounted screw.
- Clean the seal contact surface in the housing bore.
- Examine the splines on the pinion shaft for burrs or wear. Remove any burrs and clean the shaft.
- Inspect pinion yoke for cracks, worn splines and worn seal contact surface. Replace yoke if necessary.
The outer perimeter of the seal is pre-coated with a special sealant. An additional application of sealant is not required.
- Apply a light coating of gear lubricant on the lip of pinion seal.
- Install the new pinion shaft seal.
The seal is correctly installed when the seal flange contacts the face of the differential housing flange.
- Position the pinion yoke on the end of the shaft with the reference marks aligned.
- Seat the yoke on the pinion shaft.
- Remove the tools and install the pinion yoke washer. The convex side of the washer must face outward.
- Hold the pinion yoke with pipe wrench or other suitable tool and tighten shaft nut to 210 ft. lbs. (285 Nm).
- Rotate the pinion shaft several revolutions to ensure the bearing rollers are seated.
- Rotate the pinion shaft using an inch pounds beam type torque wrench. Rotating torque should be equal to the reading recorded during removal, plus an additional 5 inch lbs. (0.56 Nm).
- Install the brake drums.
- Install the wheel and tire assemblies.
- Align the propeller shaft with the pinion yoke and install.
- Lower the vehicle.