Drive Pinion Shaft Assembly: Adjustment

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Remove the liquid gasket completely.
Install the oil pump housing assembly to converter case, and secure them with tightening four bolts evenly.
NOTE: Use an old gasket or an aluminum washer so as not to damage the mating surface of housing.

Tightening torque:

41 N.m (4.2 kgf-m, 30.4 ft-lb)

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

ST2 499787700 WRENCH

Fig 2: Rotating Drive Pinion Several Times Using ST1 And ST2 Holder, Wrench 498937110,499787700
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Adjust backlash between drive pinion and crown gear. < Ref. to , ADJUSTMENT , Front Differential Assembly. >
Apply red lead evenly to the surfaces of three or four teeth on crown gear. Rotate the drive pinion in the forward and reverse directions for several times. Remove the oil pump housing, and check the tooth contact pattern.
If the tooth contact is improper, readjust the backlash or shim thickness. < Ref. to , ADJUSTMENT , Front Differential Assembly. >
- Correct tooth contact
  Checking item: Tooth contact pattern is slightly shifted toward to toe side under no-load rotation. [When loaded, contact pattern moves toward heel.]
  
  Fig 3: Identifying Correct Tooth Contact Pattern
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- Face contact
  Checking item: Backlash is too large.
  
  Contact pattern
  
  Fig 4: Identifying Face Tooth Contact Pattern
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  Corrective action: Increase thickness of pinion height adjusting washer in order to bring drive pinion close to driven gear.
  
  Fig 5: Corrective Action - Backlash Is Too Large
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- Flank contact
  Checking item: Backlash is too small.
  
  Contact pattern
  
  Fig 6: Identifying Tooth Flank Contact Pattern
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  Corrective action: Reduce thickness of pinion height adjusting washer in order to bring drive pinion away from driven gear.
  
  Fig 7: Corrective Action - Backlash Is Too Small
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- Toe contact (inside end contact)
  Checking item: Contact area is small.
  
  Contact pattern
  
  Fig 8: Identifying Tooth Toe Contact Pattern
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  Corrective action: Reduce thickness of pinion height adjusting washer in order to bring drive pinion away from driven gear.
  
  Fig 9: Corrective Action - Contact Area Is Small
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- Heel contact (outside end contact)
  Checking item: Contact area is small.
  
  Contact pattern
  
  Fig 10: Identifying Tooth Heel Contact Pattern
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  Corrective action: Increase thickness of pinion height adjusting washer in order to bring drive pinion close to driven gear.
  
  Fig 11: Corrective Action - Contact Area Is Small
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If tooth contact is correct, mark the retainer position and loosen it. After fitting a new O-ring and oil seal, screw in the retainer to the marked position. Tighten the lock plate with specified torque.
Tightening torque:

25 N.m (2.5 kgf-m, 18 ft-lb)

Fig 12: Tightening Lock Plate
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