Mitsubishi 3000GT 1991, Service Manual

Page: 624 / 1146

27-28
REAR AXLE
Differential Carrier
tooth contact pattern
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 reverse movement)
2
3
4
Problem
Tooth contact pattern resulting from exces-
sive pinion height
Solution
The drive pinion is positioned too far from the center of
the drive gear. Increase the thickness of the pinion height adjusting
shim, and position the drive pinion closer to the center
of the drive gear.
Also, for backlash adjustment, position the drive gear
farther from the drive pinion.
Tooth contact pattern resulting from insuffi-
cient pinion height
2 3 4
2 3 4
The drive pinion is positioned too close to the center of
the drive gear. Decrease the thickness of the pinion height adjusting
shim, and position the drive pinion farther from the
center of the drive gear.
Also, for backlash adjustment, position the drive gear
closer to the drive pinion.
11
S642
NOTE
Tooth contact pattern is a method for judging the result of the adjustment of drive pinion height and final drive gear
backlash. The adjustment of drive pinion height and final drive gear backlash should be repeated until tooth contact
patterns bear a similarity to the standard tooth contact pattern.
When adjustment is not able to obtain a correct pattern, it may be judged that the drive gear and drive pinion have
exceed their usage limits and both gears should be replaced as a set.
TSB Revision