Pinion, Flange, and Dust Deflector Replacement
REMOVAL PROCEDURE- Tools Required
- J8614-01 Companion Flange Holder and Remover
- J36366 Seal Installer
1. Raise the vehicle on a hoist.
2. Remove the propeller shaft from the axle. Refer to Propeller Shaft Replacement (Front Axle-All Except NP8) or Propeller Shaft Replacement (Front Axle-NP8).
3. Tie the propeller shaft to a frame rail or crossmember.
4. Measure the torque required to rotate the pinion. Record the torque value for reassembly.
5. Scribe a line (1) on the pinion stem, pinion nut and the companion flange (2) and record the number of exposed threads on the pinion stem.
6. Remove the nut. Use the J8614-01.
7. Position the J8614-01 on the flange so that the four notches on the tool face the flange.
8. Remove the flange. Use the J8614-01. Use the special nut and forcing screw.
9. Remove the oil seal.
IMPORTANT: Carefully pry the seal from the bore. Do not distort or scratch the aluminum case.
10. Inspect the pinion flange for a smooth oil seal surface.
11. Inspect the pinion flange for worn drive splines.
12. Replace the pinion flange if necessary.
13. Remove the dust deflector.
- Tap the deflector from the flange.
- Clean up the stake points on the flange.
INSTALLATION PROCEDURE
- Tools Required
- J8614-01 Companion Flange Holder and Remover
- J36366 Seal Installer
1. Install the dust deflector on the flange.
IMPORTANT: Stake the new deflector at three new equally spaced positions. You must stake the new deflector in such a way that you do not damage the seal operating surface.
2. Install the oil seal. Use the J36366.
IMPORTANT: Position the oil seal in the bore, then place the J36366 over the oil seal. Strike the J36366 with a hammer until the seal flange seats on the axle housing surface. Drive the seal in straight, not at an angle, as this will damage the aluminum housing.
3. Install the flange onto the pinion using the J8614-01.
NOTICE: Do not hammer the pinion flange/yoke onto the pinion shaft. Pinion components may be damaged if the pinion flange/yoke is hammered onto the pinion shaft.
4. 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 reference.
5. 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.
NOTICE: Refer to Fastener Notice in Service Precautions.
6. Install the propeller shaft. Refer to Propeller Shaft Replacement (Front Axle-All Except NP8) or Propeller Shaft Replacement (Front Axle-NP8).
7. Lower the vehicle.