Mitsubishi 3000GT 1991 Service Manual page 623

REAR AXLE <AWD> - Differential Carrier
(2) Insert a brass rod between the differential carrier and the
differential case, and then rotate the companion flange by
hand (once in the normal direction, and then once in the
reverse direction) while applying a load to the drive gear, so
that the revolution torque [approximately 2.5 - 3.0 Nm (28 -
33 in.lbs.)] is applied to the drive pinion.
Caution
If the drive gear is rotated too much, the tooth contact
pattern will become unclear and difficult to check.
(3) Check the tooth contact condition of the drive gear and
drive pinion.
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