Extension Case: Disassembly

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

Remove the dust cover.

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Remove the snap ring from the transfer clutch piston using the ST and a press.
Preparation tool:

ST: COMPRESSOR SPECIAL TOOL (18762AA001)

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Remove the clutch spring retainer, return spring and spring retainer.

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Blow compressed air through the hole shown in the figure, and remove the transfer clutch piston.

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Remove the D-ring and O-ring from the transfer clutch piston.

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Remove the pressure plate and ball bearing.

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Remove the extension case oil seal. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>EXTENSION CASE OIL SEAL>REPLACEMENT
Remove the plug.

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