Subaru Impreza 2003 Service Manual page 2013

31) Set the main shaft assembly to ST, then tighten
the lock nut.
ST1 18665AA000 HOLDER
ST2 18664AA000 BASE
Tightening torque:
392 N·m (40.0 kgf-m, 289 ft-lb)
32) Using the ST, caulk four portions on the lock
nut to obtain dimension A 27±0.3 mm (1.06±0.01
in).
ST 18668AA000 PUNCH
NOTE:
Do not crack the caulking part of lock nut.
ST
MAIN SHAFT ASSEMBLY
ST2
ST1
MT-00556
A
A
MT-00580
MANUAL TRANSMISSION AND DIFFERENTIAL
E: INSPECTION
Disassembled parts should be washed clean first
and then inspected carefully.
1) Bearing
Replace the bearings in the following cases.
• Worn, rusted and damaged bearing
• Bearings that fail to turn smoothly or make ab-
normal noise when turned
• Bearings having other defects
2) Bushing (each gear)
Replace the bushings in the following case.
• When the sliding surface is damaged or abnor-
mally worn.
3) Gears
Replace the gears in the following cases.
• Gear teeth surfaces are broken or excessively
worn.
• Parts that contact the baulk ring is damaged.
• The inner surface of gear is damaged.
4) Baulk ring, synchro cone
Replace the baulk ring and synchro cone in the fol-
lowing case.
• Worn, rusted and damaged baulk ring
5) Shifting insert key
Replace the shifting insert key if deformed, exces-
sively worn or defective in any way.
F: ADJUSTMENT
1. SELECTION OF MAIN SHAFT SNAP
RING AND WASHER
NOTE:
Perform the following procedures when.
• Replacing the 1st to 6th driven gear.
• Replacing the 1st and 2nd synchro ring assem-
bly.
• Replacing the ball bearing.
• Replacing the adapter plate.
• Replacing the driven shaft.
1) Insert the drive pinion assembly in adapter plate.
NOTE:
Make sure the thrust bearing outer race is not re-
moved and drive pinion is not lift-up.
6MT-83
MT-00581