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.
2021 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE
Extension Case: Installation
WARNING: This page is about a different variant/trim than selected.
- Confirm that the shaft (A), parking pawl (B) and return spring (C) are firmly attached.
- Perform the following operations when replacing the extension case.
- Select the thrust bearing. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>REAR DRIVE SHAFT>INSTALLATION .
- Select the transfer reduction driven gear shim. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSFER REDUCTION DRIVEN GEAR>INSTALLATION .
- Set the transfer reduction driven gear shim to the extension case with vaseline.
- Apply liquid gasket to the mating surface of the intermediate case as shown in the figure, and temporarily install the extension case.CAUTION: Be careful not to damage the oil seal of the extension case.
Factory Service Tools
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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.