Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 400
5MT-21
General Description
MANUAL TRANSMISSION AND DIFFERENTIAL
2. GENERAL TOOL
498267200
CYLINDER HEAD
TABLE
Used for removing and installing the roller bear-
ing of the transfer case.
498267300
CYLINDER HEAD
TABLE
Used for removing and installing the roller bear-
ing of the transfer case.
TOOL NAME
REMARKS
Circuit tester
Used for measuring resistance, voltage and current.
TORX
®
bit T70
Used for installing and removing the drain plug.
ILLUSTRATION
TOOL NUMBER
DESCRIPTION
REMARKS
ST-498267200
ST-498267300
5MT-22
Transmission Gear Oil
MANUAL TRANSMISSION AND DIFFERENTIAL
2. Transmission Gear Oil
A: INSPECTION
1) Park the vehicle on a level surface.
2) Turn the ignition switch to OFF, and wait until the
engine cools.
3) Remove the oil level gauge and wipe it clean.
4) Reinsert the oil level gauge all the way. Be sure
that the oil level gauge is correctly inserted in the
proper direction.
5) Pull out the oil level gauge again, and check the
oil level. If it is below the lower level, add oil through
the oil level gauge hole to bring the level up to the
upper level.
B: REPLACEMENT
1) Pull out the oil level gauge.
2) Lift up the vehicle.
3) Using the TORX
®
bit T70, remove the drain
plug, and drain the transmission gear oil complete-
ly.
CAUTION:
• Immediately after the vehicle has been run-
ning or after idling for a long time, the transmis-
sion gear oil will be hot. Be careful not to
receive burns.
• Be careful not to spill the transmission gear
oil on the exhaust pipe, to prevent emission of
smoke or causing a fire. If gear oil is spilled,
wipe it off completely.
4) Tighten the drain plug using TORX
®
bit T70.
NOTE:
• Tighten the drain plug after draining the trans-
mission gear oil.
• Use a new gasket.
Tightening torque:
44 N·m (4.5 kgf-m, 32.5 ft-lb) (Aluminum gas-
ket silver)
70 N·m (7.1 kgf-m, 51.6 ft-lb) (Copper gasket,
brown)
70 N·m (7.1 kgf-m, 51.6 ft-lb) (Metal gasket,
black)
5) Lower the vehicle.
6) Pour gear oil through the oil level gauge hole.
Recommended gear oil:
GL-5 (75W-90) or equivalent
Gear oil capacity:
3.5 L (3.7 US qt, 3.1 Imp qt)
7) Measure the transmission gear oil amount, and
check that it is within the specification.
(A) Oil level gauge
(B) Upper level
(C) Lower level
(B)
(C)
(A)
PI-00564
L
F
MT-01548
5MT-23
Manual Transmission Assembly
MANUAL TRANSMISSION AND DIFFERENTIAL
3. Manual Transmission As-
sembly
A: REMOVAL
1) Set the vehicle on a lift.
2) Open the front hood.
3) Disconnect the ground cable from battery.
4) Drain transmission gear oil completely. <Ref. to
5MT-22, REPLACEMENT, Transmission Gear
5) Remove the intercooler. <Ref. to IN(w/o STI)-12,
6) Disconnect the following connector.
7) Disconnect the transmission radio ground termi-
nal.
8) Remove the engine hanger.
9) Remove the starter. <Ref. to SC(w/o STI)-2,
10) Remove the operating cylinder from the trans-
mission, and suspend on a wire.
11) Remove the pitching stopper.
12) Set the ST.
ST 41099AC000 ENGINE SUPPORT ASSY
13) Lift up the vehicle.
14) Remove the center exhaust pipe. <Ref. to
EX(w/o STI)-2, General Description.>
15) Remove the rear exhaust pipe and muffler.
<Ref. to EX(w/o STI)-2, General Description.>
CAUTION:
When removing the exhaust pipes, make sure
that each exhaust pipe does not drop off.
(A) Neutral position switch and back-up light switch
connector
(B) Rear oxygen sensor connector
MT-01649
(B)
(A)
MT-01650
AT-04582
CL-00253
MT-00069
MT-01226
ST
5MT-24
Manual Transmission Assembly
MANUAL TRANSMISSION AND DIFFERENTIAL
16) Remove the bolts which hold upper side of
transmission to engine.
17) Remove the heat shield cover.
18) Remove the hangar bracket from the transmis-
sion.
19) Remove the propeller shaft. <Ref. to DS-11,
20) Remove the gear shift rod and the stay from the
transmission.
(1) Disconnect the stay from the transmission.
(2) Disconnect the gear shift rod from the trans-
mission.
21) Disconnect the stabilizer link from the front
arm.
22) Remove the bolt securing the ball joint of the
front arm to the housing, then separate the front
arms and the housing.
MT-01524
MT-01660
MT-01653
(A) Stay
(B) Gear shift rod
(A) Front arm
(B) Ball joint
MT-00075
(A)
(B)
(B)
MT-01655
MT-01652
(B)
(A)
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