DRIVE TRAIN 4-19
TOOTH CONTACT
After backlash adjustment and left side shim selection are car-
ried out, the tooth contact must be checked. Pay attention to the
following points:
• Remove the differential ring gear.
• Clean and degrease several teeth on the ring gear and pinion
gear, and then apply a coating of machinist’s layout dye or
paste to several teeth of the pinion gear.
• Install the removed left and right side shims and differential
assembly.
• Assemble the gear case cover. (!4-14)
NOTE:
* Do not apply a sealant to the mating surface of the gear case.
* Do not apply a thread lock to the case cover bolts.
(!4-14)
( Gear case cover bolt: 23 N·m (2.3 kgf-m, 16.5 lb-ft)
• Rotate the differential ring gear several turns in each direc-
tion. This will provide a contact pattern on the coated teeth of
ring gear.
• Remove the differential ring gear and compare the coated
teeth to the examples shown in
1,
2 and
3.
• If tooth contact is found to be correct (example
2), go to the
FINAL ASSEMBLY sub-section on p.4-14 to complete instal-
lation.
• If tooth contact is found to be incorrect (example
1 and
3),
the shim must be changed and the tooth contact should be re-
checked until correct.
"
Make sure to check the backlash and shim thickness
after the tooth contact has been adjusted, since it may
have changed. Adjust the tooth contact and backlash
until they are both within specification. If the correct
tooth contact cannot be maintained when adjusting
the backlash, replace the pinion gear and ring gear as
a set.
Incorrect (Contact at tooth top)
Incorrect (Contact at tooth root)
Correct
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