Drive Pinion Shaft Assembly: Adjustment

Remove the liquid gasket from the mating surface completely.
Using the ST, install the drive pinion retainer to converter case.
ST1 18270KA020 SOCKET (E20)

NOTE: Do not confuse the three different-length bolts when installing.

Tightening torque:

43 N.m (4.4 kgf-m, 31.7 ft-lb)

Fig 1: Identifying Bolts In Sequence
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Rotate the drive pinion several times using ST1 and ST2.
ST1 18667AA010 HOLDER

ST2 499787700 WRENCH

Fig 2: Identifying ST1 18667Aa010 Holder And ST2 499787700 Wrench
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Adjust the drive pinion and hypoid driven gear backlash. Ref. to ADJUSTMENT , Front Differential Assembly.
Using the ST, remove the drive pinion retainer from converter case.
ST1 18270KA020 SOCKET (E20)
Apply lead-free red dye evenly on the both sides of three to four teeth of the hypoid driven gear. Then install the drive pinion retainer and rotate the drive pinion in both directions several times. Remove the drive pinion retainer and check the tooth contact pattern.
If the teeth contact is inappropriate, adjust the backlash or thickness of the shim. Ref. to ADJUSTMENT , Front Differential Assembly.

NOTE: After correction, wipe off the lead-free red dye.
- 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 Tooth Contact Pattern
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- Face contact
Check item: Backlash is too large

Contact pattern

Fig 4: Identifying Tooth Contact Pattern
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Corrective action: Increase thickness of pinion height adjusting washer according to the procedure for bringing drive pinion close to hypoid driven gear side.

Fig 5: Adjusting Pinion Height
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- Flank contact
Check item: Backlash is too small

Contact pattern

Fig 6: Identifying Tooth Contact Pattern
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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: Adjusting Pinion Height
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- Toe contact (inside contact)
Check item: Teeth contact area is too small

Contact pattern

Fig 8: Identifying Tooth Contact Pattern
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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: Adjusting Pinion Height
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- Heel contact (outside end contact)
Check item: Teeth contact area is too small.

Contact pattern

Fig 10: Identifying Tooth Contact Pattern
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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: Adjusting Pinion Height
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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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