Subaru Impreza 2002 Service Manual page 400

F: ADJUSTMENT
1) Inspect and adjust the backlash between hypoid
driven gear and drive pinion. <Ref. to 6MT-114,
HYPOID GEAR BACKLASH, ADJUSTMENT,
Front Differential Assembly.>
2) Apply a uniform thin coat of red lead on both
teeth surfaces of three or four teeth of the hypoid
driven gear.
3) Install the drive pinion shaft assembly to clutch
housing, then tighten at least four bolts.
NOTE:
Install with the liquid gasket remaining to prevent
the mating surface of clutch housing and adapter
plate from damaging.
Tightening torque:
50 N·m (5.1 kgf-m, 36.9 ft-lb)
4) Using the ST, rotate several times.
ST 18631AA000 HANDLE
DRIVE PINION SHAFT ASSEMBLY
TR0816
TR0817
6MT-105
MANUAL TRANSMISSION AND DIFFERENTIAL