Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSCVT TRANSAXLE (TR580)AUTOMATIC TRANSMISSION ASSEMBLYINSTALLATION

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans

Automatic Transmission Assembly: Installation

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Installation

Attach the ST to converter case.
Preparation tool:

ST: STOPPER SET (498277200)

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When completely overhauling the transmission, refill CVTF through the transmission right side plug. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>PREPARATION FOR OVERHAUL .
Replace the front differential side retainer oil seal. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>DIFFERENTIAL SIDE RETAINER OIL SEAL>REPLACEMENT .
NOTE:
- Be sure to replace the differential side retainer oil seal with a new part whenever the front drive shaft is removed from the transmission .
- When a new differential side retainer oil seal has been installed, replacement is not required .
Install the rear cushion rubber on the transmission.
Tightening torque:

40 N.m (4.1 kgf-m, 29.5 ft-lb)

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Mount the transmission onto the transmission jack.
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 extra overload or impact to the transmission case.

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Remove the pitching stopper bracket, if mounted.
Install the transmission onto the engine.
NOTE:
- While raising the transmission jack gradually, turn the screw of engine support, then tilt the engine forward .
- Temporarily attach the two engine connecting bolts and two nuts (lower side) .
Install the transmission rear crossmember.
Tightening torque:

T1: 35 N.m (3.6 kgf-m, 25.8 ft-lb)

T2: 75 N.m (7.6 kgf-m, 55.3 ft-lb)

Fig 1: Transmission Rear Crossmember Nuts And Bolts (With Torque Specification)
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Tighten the two engine connecting bolts and two nuts (lower side).
Tightening torque:

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

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Install the exhaust hanger bracket.
Tightening torque:

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

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Remove the transmission jack.
Lower the vehicle.
Install the three engine mounting bolts (upper side).
Tightening torque:

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

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Remove the ST1 and ST2.
Preparation tool:

ST1: ENGINE SUPPORT BRACKET (41099AA012)

ST2: ENGINE SUPPORT (41099AA020)

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Install the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>TRANSMISSION CONTROL MODULE (TCM)>INSTALLATION .
Insert the transmission case cover (small) between transmission case cover (large) and transmission to install.
CAUTION:
When inserting, be careful that the insulator inside transmission case cover is not turned over.

Tightening torque:

7 N.m (0.7 kgf-m, 5.2 ft-lb)

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Install the torque converter assembly to the drive plate.

Remove the ST from converter case.

NOTE:

Be careful not to drop the ST into the converter case when removing the ST.

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Insert the wrench into the crank pulley bolt, and rotate the crank pulley to install the bolts which hold the torque converter assembly to the drive plate using the ST.

NOTE:

Be careful not to drop bolts into the converter housing .
When not using the ST, use a crowfoot wrench for tightening .
Use the following formula to calculate the reading of a torque wrench when tightening with a crowfoot wrench .

Calculation formula

T = 25 N.m (2.5 kgf-m, 18.4 ft-lb) x L1/(L1 + L2)

T: Reading of the torque wrench

L1: Effective length of the torque wrench

L2: Effective length of the crowfoot wrench

NOTE:

If the effective length of the tool used is unknown, consult the manufacturer of the tool.

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Effective length of the crowfoot wrench
Effective length of the torque wrench
Center of the open end of crowfoot wrench
Center of drive square of the torque wrench
Center of the position where a force is applied by hand

Preparation tool:

ST: SOCKET (18270AA050)

Tightening torque:

25 N.m (2.5 kgf-m, 18.4 ft-lb)

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Install the remaining five bolts by rotating the crank pulley a little at a time in the same direction as engine revolution.
Tightening torque:

25 N.m (2.5 kgf-m, 18.4 ft-lb)
Install the service hole plug.

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Install the engine ground.
Tightening torque:

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

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Replace the CVTF cooler inlet hose and CVTF cooler outlet hose. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>CVTF COOLER (WITH WARMER FUNCTION)>REMOVAL . Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>CVTF COOLER (WITH WARMER FUNCTION)>INSTALLATION .
Install the CVTF cooler inlet hose and CVTF cooler outlet hose to transmission.

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Install the CVTF cooler (with warmer feature) to the transmission.
Tightening torque:

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

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Install the starter. Ref. to STARTING/CHARGING SYSTEMS (H4DO (EXCEPT FOR HEV))>STARTER>INSTALLATION .
Install the engine rear hanger.
Tightening torque:

21 N.m (2.1 kgf-m, 15.5 ft-lb)

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Install the pitching stopper bracket.
NOTE:
Tighten the bolt side while holding the nut side.

Tightening torque:

41 N.m (4.2 kgf-m, 30.2 ft-lb)

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Connect the throttle position sensor harness connector (1), purge control solenoid valve harness connector (2), harness clip (3), vacuum hose (4) and PCV hose (5).

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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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Install the air breather hose and air breather hose bracket.

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Install the engine harness connector bracket.
Tightening torque: 19 N.m (1.9 kgf-m, 14 ft-lb)

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Connect the transmission harness connector.

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Lift up the vehicle.
Set the ST to the side retainer.
Preparation tool: ST: OIL SEAL PROTECTOR (28399SA010)

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Replace the circlip of the drive shaft with a new part.
Insert the front drive shaft spline section into transmission and remove the ST (OIL SEAL PROTECTOR).
NOTE:
- Before inserting the RH front drive shaft into transmission, turn the steering wheel to the right hand at full lock.
- Before inserting the LH front drive shaft into transmission, turn the steering wheel to the left hand at full lock.
Insert the drive shaft into the transmission securely by pressing the front axle housing from outside of the vehicle.
CAUTION:
- To prevent the front lower arm assembly from damaging the ball joint dust cover, place the ball joint on the upper side of the front lower arm assembly before starting the operation.
- Be careful not to damage the front lower arm assembly and ball joint by covering the upper side of the front lower arm assembly with a cloth.
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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Install the front ABS wheel speed sensor. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>FRONT ABS WHEEL SPEED SENSOR>INSTALLATION .
Install the brake hose bracket.
Tightening torque: 33 N.m (3.4 kgf-m, 24.3 ft-lb)

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Install the cable plate to the transmission.
Tightening torque: 25 N.m (2.5 kgf-m, 18.4 ft-lb)

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Install the washer and snap pin to the shifter arm.

CAUTION:

Do not apply excessive load while holding the part (a).

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Install the propeller shaft. Ref. to DRIVE SHAFT SYSTEM>PROPELLER SHAFT>INSTALLATION .
Install the center exhaust cover. Ref. to HEAT SHIELD COVER .
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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Install the under cover. Ref. to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>INSTALLATION .
Install the front tires. Ref. to WHEEL AND TIRE SYSTEM>TIRE AND WHEEL>INSTALLATION .
Lower the vehicle.
Tighten the self-locking nut of the strut mount - front using the ST.
CAUTION:
- Use a new self-lock nut.
- Tighten in the state where the wheels are in full contact with the ground.
Preparation tool: ST: STRUT MOUNT SOCKET (20399AG000)

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

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Connect the transmission radio ground terminal.
Tightening torque: 32.3 N.m (3.3 kgf-m, 23.8 ft-lb)

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Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO (EXCEPT FOR HEV))>AIR INTAKE BOOT>INSTALLATION .
Shift the select lever to "P range".
Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
Refill differential gear oil to adjust the differential gear oil amount. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>DIFFERENTIAL GEAR OIL>ADJUSTMENT .
Refill CVTF to adjust the CVTF level. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>CVTF>ADJUSTMENT .
Using the Subaru Select Monitor, perform «Clear AT learning value» on «Work Support», and perform the operation of AT learning mode. Ref. to TRANSMISSION (DIAGNOSTICS) (IMPREZA MODEL)>LEARNING CONTROL>PROCEDURE .
Execute the rear differential inspection mode. Ref. to DIFFERENTIALS>REAR DIFFERENTIAL INSPECTION MODE .
CAUTION:
Always execute the rear differential inspection mode after the replacement of the following.
- Replacement of transmission assembly
- Replacement of front differential hypoid gear set
Inspect the wheel alignment and adjust if necessary. Ref. to FRONT SUSPENSION>WHEEL ALIGNMENT>ADJUSTMENT .
Perform the road test to make sure there is no fault. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>ROAD TEST>INSPECTION .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.