Pinion Oil Seal Replacement

- Tools Required:
- J 8614-01 Companion Flange Holder and Remover
- J 36366 Seal Installer


Remove or Disconnect

- Raise the vehicle on a hoist.

1. Propeller shaft from the axle.
- Tie the propeller shaft to a frame rail or crossmember.

Measure



- The torque required to rotate the pinion. Record the torque value for reassembly.





Important: Scribe a line on the pinion stem, pinion nut and the companion flange and record the number of exposed threads on the pinion stem.





2. Nut using J 8614-01.
- Position J 8614-01 on the flange so that the four notches on the tool face the flange.





3. Flange using J 8614-01.
- Use the special nut and forcing screw to remove the flange.
4. Oil seal.
- Carefully pry the seal from the bore. Do not distort or scratch the aluminum case.

Inspect
- The pinion flange for a smooth oil seal surface.
- The pinion flange for worn drive splines.
- Replace if necessary.

5. Dust deflector.
- Tap the deflector from the flange.
- Clean up the stake points on the flange.

Install or Connect

1. Dust deflector on the flange.
- Stake the new deflector at three new equally spaced positions. Staking must be such that the seal operating surface is not damaged.





2. Oil seal using J 36366.
- Position the oil seal in the bore, then place J 36366 over the oil seal. Strike J 36366 with a hammer until the seal flange is seated on the axle housing surface. Drive the seal in straight, not at an angle, as this will damage the aluminum housing.

NOTICE: Do not hammer the pinion flange onto the pinion shaft or the pinion flange may be damaged.

3. Flange onto the pinion using J 8614-01.
- Place the washer and a new nut on the pinion threads and tighten the nut to the original scribed position using the scribe marks and exposed threads as a reference.

Measure
- The rotating torque of the pinion and compare this with the rotating torque recorded earlier.

Tighten
- The pinion nut by small increments until the torque required to rotate the pinion is 0.35 Nm (3 inch lbs.) greater than the original torque.

4. Propeller shaft.
5. Lower the vehicle.