Transfer Clutch: Adjustment

WARNING: This page is about a different car, the 2020 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Install the transfer clutch assembly to the extension case with the transfer driven gear shims and thrust bearings removed.

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Install the thrust bearing to the transfer driven gear.
NOTE: Make sure to install in the right direction.

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Using the ST, measure the height "A" from the ST end face to the thrust bearing catch surface of the transfer clutch assembly.
Preparation tool:

ST: GAUGE (499575500)

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Using the ST, measure the height "B" from the transmission case mating surface to the end of ST.
Preparation tool:

ST: GAUGE (499575500)

Courtesy of SUBARU OF AMERICA, INC.

Obtain the thickness of transfer driven gear shim using the following formula to select one to three transfer driven gear shims.

T mm = A - B - (0.05 - 0.25)

[T in = A - B - (0.002 - 0.01)]

T: Transfer driven gear shim thickness

A: Height from the ST end face to the transfer clutch assembly thrust bearing catch surface

B: Height from the mating surface of the transmission case to the end of the ST

0.05 - 0.25 mm (0.002 - 0.01 in): Clearance

Transfer driven gear shim
Part No.	Thickness mm (in)
33280AA030	0.3 (0.012)
33280AA040	0.4 (0.016)
33280AA050	0.5 (0.020)