Rear final drive (φ220 mm { 8.66 in }) (LSD) inspection

1. Final drive inspection

1) Inspect each bearing for the following.

  • Seizing
  • Spalling
  • Noise

Legend

  1. Inner bearing
  2. Outer bearing
  3. Side bearing

2) Inspect the differential carrier rear axle mounting section, differential carrier side bearing mounting section, as well as bearing cap for the following.

  • Cracking
  • Damage
  • Wear

3) Inspect the pinion bearing race and pinion bearing oil seal inlay sections for the following.

  • Cracking
  • Damage
  • Wear

4) Inspect the flange for the following.

  • Worn oil seal contact section
  • Worn spline section
  • Cracking of mounting section
  • Damage to the mounting section

5) Inspect the gear contact surfaces on the drive and coast sides of the ring gear and drive pinion for the following.

  • Chipping
  • Cracking
  • Spalling
  • Pitting
  • Improper tooth contact

6) Inspect the spline section of the drive pinion for the following.

  • Cracking
  • Twisting
  • Damage

Caution

  • Replace the ring gear and drive pinion as a set.

2. Differential cage inspection

1. Visual inspection

1) Inspect the differential cage for the following.

  • Wear
  • Damage
  • Corrosion
  • Other malfunctions

2) Inspect the friction disc, friction plate, and spring plate for the following.

  • Wear
  • Damage
  • Abnormal noise

Legend

  1. Friction sliding surface
  2. Protrusion

3) Inspect the following sections of the pressure ring for damage or other abnormal conditions.

  • Sliding surface of the pressure ring and friction disc
  • Sliding surface of the pressure ring inner surface and pinion gear
  • Sliding surface of the pressure ring hole and side gear
  • Sliding surface of the pressure ring and drive pinion
  • Mating surface of the pressure ring and differential cage A
  • Pressure ring and differential cage sliding surface

Note

  • If there are dents or damage on the pressure ring and friction sliding surface, repair using an oil stone and compound.
  • If there are minor burrs and dents on the pressure ring and differential cage sliding surface, repair using an oil stone.

Legend

  1. Sliding surface of the pressure ring and side gear
  2. Sliding surface of the pressure ring inner surface and pinion gear
  3. Sliding surface of the pressure ring hole and side gear
  4. Sliding surface of the pressure ring and drive pinion
  5. Mating surface with differential cage A
  6. Friction disc sliding surface
  7. Pressure ring and differential cage sliding surface

4) Inspect the following sections of the side gear thrust washer for damage or other abnormal conditions.

  • Sliding surface of the pressure ring and side gear
  • Sliding surface between the side gear and the thrust washer
  • Sliding surface of the pressure ring and drive pinion
  • Sliding surface of the pressure ring hole and side gear
  • Burrs on the denting section around the side gear

Note

  • Repair minor burrs and dents around the side gear using an oil stone.

Legend

  1. Sliding surface of the pressure ring and side gear
  2. Sliding surface between the side gear and the thrust washer
  3. Sliding surface of the pressure ring and spider
  4. Sliding surface of the pressure ring hole and side gear
  5. Burrs on the denting section around the side gear

5) Inspect the following sections of the differential cage for damage or other abnormal conditions.

  • Contact surface of the differential cage and thrust washer
  • Contact surface of the differential cage and spring plate

Legend

  1. Contact surface of differential cage A and the thrust washer
  2. Sliding surface of the side gear and thrust washer
  3. Contact surface of differential cage A and the spring plate

Legend

  1. Mating surface of differential cage A and differential cage A
  2. Sliding surface of the pressure ring and differential cage B
  3. Contact surface of differential cage B and the thrust washer
  4. Contact surface of differential cage B and the spring plate

2. Friction disc and friction plate measurement

1) Measure the deformation of the friction disc and friction plate using a dial gauge.

Limit: 0.08 mm { 0.003 in }

2) Measure the wear of the friction disc and friction plate using a micrometer.

Limit: 0.1 mm { 0.004 in }

Legend

  1. Protrusion
  2. Friction sliding surface

Legend

  1. Protrusion
  2. Friction sliding surface

3. Side gear thrust washer measurement

1) Measure wear of the side gear thrust washer using a micrometer.

Limit: 1.3 mm { 0.05 in }

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