Manual Transmission Assembly; Transmission Case; Main Shaft Assembly For Single-Range - Subaru 2004 Impreza Service Manual

MANUAL TRANSMISSION AND DIFFERENTIAL
16.Main Shaft Assembly for Sin-
gle-Range
A: REMOVAL
1) Remove the manual transmission assembly
from vehicle. <Ref. to 5MT-38, REMOVAL, Manual
Transmission Assembly.>
2) Remove the transfer case with extension case
assembly. <Ref. to 5MT-53, REMOVAL, Transfer
Case and Extension Case Assembly.>
3) Remove the transmission case. <Ref. to 5MT-
53, REMOVAL, Transfer Case and Extension Case
Assembly.>
4) Remove the drive pinion shaft assembly. <Ref.
to 5MT-91, REMOVAL, Drive Pinion Shaft Assem-
bly.>
5) Remove the main shaft assembly.
B: INSTALLATION
1) Install the needle bearing and oil seal onto the
front of transmission main shaft assembly.
NOTE:
• Wrap the clutch splined section with vinyl tape to
prevent damage to oil seal.
• Apply grease (Unilube #2 or equivalent) to the
sealing lip of oil seal.
• Use a new one.
2) Install the needle bearing outer race knock pin
hole into transmission case knock pin.
NOTE:
Align the end face of seal with surface (A) when in-
stalling oil seal.
(A)
3) Install the drive pinion assembly. <Ref. to 5MT-
91, INSTALLATION, Drive Pinion Shaft Assem-
bly.>
4) Install the transmission case. <Ref. to 5MT-68,
INSTALLATION, Transmission Case.>
5) Install the transfer case with extension case as-
sembly. <Ref. to 5MT-53, INSTALLATION, Trans-
fer Case and Extension Case Assembly.>
6) Install the manual transmission assembly to ve-
hicle. <Ref. to 5MT-41, INSTALLATION, Manual
Transmission Assembly.>

Main Shaft Assembly for Single-Range

MT-00185
5MT-72
C: DISASSEMBLY
1. AWD MODEL
1) Put vinyl tape around the main shaft splines to
protect oil seal from damage. Then pull out the oil
seal and needle bearing by hand.
2) Remove the lock nut from transmission main
shaft assembly.
NOTE:
Remove the caulking before removing lock nut.
ST1 499987000 TRANSMISSION HOLDER
ST2 498937003 SOCKET WRENCH (35)
ST2
3) Remove the 5th-Rev sleeve and hub assembly,
baulk ring, 5th drive gear and needle bearing.
(A) 5th-Rev sleeve and hub ASSY
(B) Baulk ring
(C) 5th drive gear
ST1
MT-00186
( C )
( B )
( A )
MT-00187