Reduction Driven Gear: 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.

Measure the height "A" from the ST upper face to the ball bearing catch surface.
Preparation tool:

ST: GAUGE (499575600)

Courtesy of SUBARU OF AMERICA, INC.
Measure the height "B" from the ST to the mating surface of the transmission case.
Preparation tool:

ST: GAUGE (499575600)

Courtesy of SUBARU OF AMERICA, INC.

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

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

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

T: Shim thickness

A: Height from the ST upper face to the ball bearing catch surface

B: Height from ST to transmission case mating surface

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

Transfer drive gear shim
Part No.	Thickness mm (in)
33279AA090	0.3 (0.012)
33279AA100	0.4 (0.016)
33279AA110	0.5 (0.020)