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.
ST 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 Drive Pinion Retainer Mounting Bolts
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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 Using Special Tools
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Adjust the drive pinion and hypoid driven gear backlash. Refer to ADJUSTMENT .
Using the ST, remove the drive pinion retainer from converter case.
ST 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. Refer to ADJUSTMENT .

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 Correct Tooth Contact Pattern (Toe And Heel Side)
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- Face contact
Check item: Backlash is too large.

Contact pattern

Fig 4: Identifying Tooth Face Contact Pattern (Backlash Is Too Large)
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Corrective action: Increase thickness of drive pinion shim according to the procedures for moving the drive pinion close to hypoid driven gear.

Fig 5: Identifying Corrective Action For Moving Drive Pinion Close To Hypoid Driven Gear
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- Flank contact
Check item: Backlash is too small.

Contact pattern

Fig 6: Identifying Tooth Flank Contact Pattern (Backlash Is Too Small)
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Corrective action: Reduce the thickness of the drive pinion shim according to the procedures for moving the drive pinion away from the hypoid driven gear.

Fig 7: Identifying Corrective Action For Moving Drive Pinion Away From Hypoid Driven Gear
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- Toe contact (inside contact)
Check item: Teeth contact area is too small.

Contact pattern

Fig 8: Identifying Tooth Toe Contact Pattern (Teeth Contact Area Is Too Small)
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Corrective action: Reduce the thickness of the drive pinion shim according to the procedures for moving the drive pinion away from the hypoid driven gear side.

Fig 9: Identifying Corrective Action For Moving Drive Pinion Away From Hypoid Driven Gear
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- Heel contact (outside end contact)
Check item: Teeth contact area is too small.

Contact pattern

Fig 10: Identifying Tooth Heel Contact Pattern (Teeth Contact Area Is Too Small)
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Corrective action: Increase the thickness of the drive pinion shim according to the procedures for moving the drive pinion closer to the hypoid driven gear.

Fig 11: Identifying Corrective Action For Moving Drive Pinion Close To Hypoid Driven Gear
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Using the ST, loosen the differential side retainer until the mounting groove of the O-ring appears, and then install the O-ring.
NOTE:
- When loosening the differential side retainer, record the number of the turns made.
- Perform this for both left and right differential side retainers.
- Use new O-rings.
- Apply the differential gear oil to O-ring.
ST 18658AA020 WRENCH COMPL RETAINER
Using the ST, tighten the retainer to the position before it is loosened.
ST 18658AA020 WRENCH COMPL RETAINER
Replace the differential side retainer oil seal with a new part. Refer to DIFFERENTIAL SIDE RETAINER OIL SEAL .
Install the lock plate.
Tightening torque:

25 N.m (2.5 kgf-m, 18.4 ft-lb)

Fig 12: Identifying Lock Plate
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