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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 12 (CVT TRANSAXLE (TR580))EXTENSION CASEINSTALLATION

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

Extension Case: Installation

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

WARNING: This page is about a different car, the 2022 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

Check the projection (A) of the knock pins.

NOTE:

When attached on the extension case side, install on the transmission case side.

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Specification:

8.5 - 9.5 mm (0.33 - 0.37 in)

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Confirm that the shaft (A), parking pawl (B) and return spring (C) are firmly attached.

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Perform the following operations when replacing the extension case.
1. Select the transfer driven gear shim. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 CROSSTREK)>TRANSFER CLUTCH>INSTALLATION .
2. Select the transfer drive gear shim. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 CROSSTREK)>REDUCTION DRIVEN GEAR>INSTALLATION .
Install a new seal ring.
NOTE:
- Apply CVTF to the seal rings.
- Do not stretch the seal ring more than necessary.
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Install a new O-ring.
NOTE:
Apply CVTF to the O-rings.

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Using vaseline, set the transfer driven gear shim and transfer drive gear shim.

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Apply liquid gasket to the mating surface of the transmission case as shown in the figure, and temporarily install the extension case and transmission hanger (A).
CAUTION:
Be careful not to damage the oil seal of the extension case.

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.