Drive Pinion Shaft Assembly: Adjustment

Remove the liquid gasket from the mating surface completely.
Install the oil pump housing assembly to the converter case, and secure them by tightening the four bolts evenly.
NOTE: Use an old gasket or aluminum washer to prevent damaging the mating surface of the housing.

Tightening torque: 41 N.m (4.2 kgf-m, 30.2 ft-lb)

Fig 1: Installing Oil Pump Housing Assembly
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Rotate the drive pinion a few times using ST1 and ST2.
ST1 498937110 HOLDER

ST2 499787700 WRENCH

Fig 2: Rotating Drive Pinion Using ST1 498937110 Holder And ST2 499787700 Wrench
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Adjust the drive pinion and hypoid driven gear backlash. Refer to ADJUSTMENT , Front Differential Assembly.
Apply lead-free red dye evenly on the surface of three to four teeth of the hypoid driven gear. Rotate the drive pinion back and forward several times. Remove the oil pump housing, and check the teeth contact pattern.
If the teeth contact is inappropriate, adjust the backlash or thickness of the shim. Refer to ADJUSTMENT , Front Differential Assembly.
- Correct tooth contact
  Check item: Tooth contact surface is slightly shifted toward the toe side under a no-load condition. (When driving, it moves towards the heel side.)
  
  Fig 3: Identifying Correct Tooth Contact
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- Face contact
  Check item: Backlash is too small.
  
  Contact pattern
  
  Fig 4: Identifying Face Contact
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  Corrective action: Increase thickness of drive pinion height adjusting washer in order to bring drive pinion close to hypoid driven gear.
  
  Fig 5: Corrective Action Of Contact Pattern
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- Flank contact
  Check item: Backlash is too large.
  
  Contact pattern
  
  Fig 6: Identifying Flank Contact
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  Corrective action: Reduce the thickness of pinion height adjusting washer according to the procedure for bringing drive pinion away from hypoid driven gear.
  
  Fig 7: Corrective Action Of Contact Pattern
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- Toe contact (inside contact)
  Check item: Contact area is too small.
  
  Contact pattern
  
  Fig 8: Identifying Toe Contact (Inside Contact)
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  Corrective action: Reduce the thickness of pinion height adjusting washer according to the procedure for bringing drive pinion away from hypoid driven gear side.
  
  Fig 9: Corrective Action Of Contact Pattern
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- Heel contact (outside end contact)
  Check item: Contact area is too small.
  
  Contact pattern
  
  Fig 10: Identifying Heel Contact (Outside End Contact)
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  Corrective action: Increase thickness of pinion height adjusting washer according to the procedures for moving the drive pinion closer to the hypoid driven gear.
  
  Fig 11: Corrective Action Of Contact Pattern
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If tooth contact is correct, mark the differential side retainer position and loosen. After fitting a new O-ring and oil seal, screw in the differential side retainer to the marked position. Tighten the lock plate with specified torque.
Tightening torque: 25 N.m (2.5 kgf-m, 18.4 ft-lb)

Fig 12: Identifying Lock Plate
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