FRONT AXLE ± Differential Carrier
26-32
Standard tooth contact pattern Problem Solution
1 Narrow tooth side
2 Drive-side tooth surface (the side
applying power during forward
movement)
3 Wide tooth side
4 Coast-side tooth surface (the
side applying power during re-
verse movement)
1
2
4
Tooth contact pattern resulting from
excessive pinion height
The drive pinion is positioned too far
from the centre of the drive gear.
1
2
3
4
Increase the thickness of the drive
pinion rear shim, and position the
drive pinion closer to the centre of the
drive gear. Also, for backlash adjust-
ment, position the drive gear farther
from the drive pinion.
1
2
3
4
3
Tooth contact pattern resulting from
insufficient pinion height.
The drive pinion is positioned too
close to the centre of the drive gear.
1
2
3
4
Decrease the thickness of the drive
pinion rear shim, and position the
drive pinion farther from the centre of
the drive gear. Also, for backlash
adjustment, position the drive gear
closer to the drive pinion.
1
2
3
4
NOTE
Checking the tooth contact pattern is the way to
confirm that the adjustments of the pinion height
and backlash have been done properly. Continue
to adjust the pinion height and backlash until the
tooth contact pattern resembles the standard
pattern.
If, even after adjustments have been made, the
correct tooth contact pattern cannot be obtained,
it means that the drive gear and the drive pinion
have become worn beyond the allowable limit.
Replace the gear set.
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