Manual Transmission Assembly: Installation

WARNING: This page is about a different car, the 2021 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Install the release bearing & lever. Ref. to CLUTCH SYSTEM>RELEASE BEARING AND LEVER>INSTALLATION .
Replace the differential side retainer oil seal with a new part. Ref. to MANUAL TRANSMISSION AND DIFFERENTIAL (5MT)>DIFFERENTIAL SIDE RETAINER OIL SEAL>REPLACEMENT .
CAUTION: Be sure to replace the oil seal after removing the front drive shaft.

NOTE: When a new oil seal has been installed, replacement is not required.
Strike and bend the transmission hanger of transmission rear with a rubber hammer etc. so that it gets in contact with the transmission case.
CAUTION: Do not apply excessive load or impact to the transmission case.

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Install the transmission cushion rubber to the transmission, and tighten the bolt (A).
Install the transmission cushion rubber to the center crossmember, and temporarily tighten the nut (B).
Tightening torque: Bolt (A)

35 N.m (3.6 kgf-m, 25.8 ft-lb)

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Install the transmission assembly onto the engine.
1. Lift up the transmission gradually using a transmission jack.
2. Engage at the spline section.
CAUTION: Be careful not to hit the main shaft against the clutch cover.
While raising the transmission jack, loosen the turnbuckle of the ST (ENGINE SUPPORT), and set the engine unit to the original position.
Install the front crossmember and rear crossmember.
Tighten the transmission cushion rubber mounting nut.
Tightening torque:

T1: 75 N.m (7.6 kgf-m, 55.3 ft-lb)

T2: 140 N.m (14.3 kgf-m, 103.3 ft-lb)

T3: 35 N.m (3.6 kgf-m, 25.8 ft-lb)

Fig 1: Front And Rear Crossmember, Transmission Cushion Rubber Mounting Nuts, Bolts (With Torque Specification)
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Take out the transmission jack.
Tighten the bolts and nuts which hold the lower side of transmission to the engine.
Tightening torque:

50 N.m (5.1 kgf-m, 36.9 ft-lb)

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Lower the vehicle.
Install the starter. Ref. to STARTING/CHARGING SYSTEMS (H4DO (EXCEPT FOR HEV))>STARTER>INSTALLATION .
Tighten the bolts which hold the upper side of the transmission to the engine.
Tightening torque:

50 N.m (5.1 kgf-m, 36.9 ft-lb)

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Remove ST (ENGINE SUPPORT BRACKET and ST ENGINE SUPPORT).
Install the engine ground terminals.
Tightening torque:

19 N.m (1.9 kgf-m, 14.0 ft-lb)
Install the engine harness stay and MT docking connector together as a unit.
Tightening torque:

19 N.m (1.9 kgf-m, 14.0 ft-lb)

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Install the pitching stopper.
Tightening torque:

T1: 50 N.m (5.1 kgf-m, 36.9 ft-lb)

T2: 58 N.m (5.9 kgf-m, 42.8 ft-lb)

Fig 2: Pitching Stopper Nuts And Bolts (With Torque Specification)
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Lift up the vehicle.
Set the ST (OIL SEAL PROTECTOR) to the differential side retainer.
Replace the circlip of the front drive shaft with a new part.
Install the front drive shaft and remove ST.
Preparation tool:

ST: OIL SEAL PROTECTOR (28399SA010)

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Replace the flange nut with a new part, and install the ball joint to the front arm.
Tightening torque:

100 N.m (10.2 kgf-m, 73.8 ft-lb)

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Replace the flange nut with a new part, and install the stabilizer link.
Tightening torque:

60 N.m (6.1 kgf-m, 44.3 ft-lb)

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Attach the gear shift rod and stay.

Replace the self-locking nut with a new part, and install the gear shift rod.

Tightening torque:

12 N.m (1.2 kgf-m, 8.9 ft-lb)

G13937291

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Replace the self-locking nut with a new part, and install the stay.

Tightening torque:

18 N.m (1.8 kgf-m, 13.3 ft-lb)

G13937292

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Install the propeller shaft. Ref. to DRIVE SHAFT SYSTEM>PROPELLER SHAFT>INSTALLATION .
Install the hanger bracket.
Tightening torque:

23 N.m (2.3 kgf-m, 17.0 ft-lb)

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Install the center exhaust cover.
Tightening torque:

18 N.m (1.8 kgf-m, 13.3 ft-lb)

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Install the rear exhaust pipe. Ref. to EXHAUST (H4DO (EXCEPT FOR HEV))>REAR EXHAUST PIPE>INSTALLATION .
Install the front exhaust pipe. Ref. to EXHAUST (H4DO (EXCEPT FOR HEV))>FRONT EXHAUST PIPE>INSTALLATION .
Install the crossmember support - rear.
Tightening torque:

70 N.m (7.1 kgf-m, 51.6 ft-lb)

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Lower the vehicle.
Using the ST, tighten the strut mount self-locking nut.
Special tool:

ST: STRUT MOUNT SOCKET (20399AG000)

Tightening torque:

55 N.m (5.6 kgf-m, 40.6 ft-lb)

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Install the operating cylinder.
Tightening torque:

37 N.m (3.8 kgf-m, 27.3 ft-lb)

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Install the engine hanger rear.
Tightening torque:

36 N.m (3.7 kgf-m, 26.6 ft-lb)

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Install the transmission radio ground cord terminal.
Tightening torque:

32.3 N.m (3.3 kgf-m, 23.8 ft-lb)

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Install the air breather hose.

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Install the coupling harness.

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Pour in transmission gear oil and check the oil level. Ref. to MANUAL TRANSMISSION AND DIFFERENTIAL (5MT)>TRANSMISSION GEAR OIL .
Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO (EXCEPT FOR HEV))>AIR INTAKE BOOT>INSTALLATION .
Install the front tires. Ref. to WHEEL AND TIRE SYSTEM>TIRE AND WHEEL>INSTALLATION .
Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
Inspect the wheel alignment and adjust if necessary. Ref. to FRONT SUSPENSION>WHEEL ALIGNMENT .