Transfer Reduction Driven Gear: Adjustment

Measure depth "A" from the ST upper face to the ball bearing catch surface.
ST 398643600 GAUGE

Fig 1: Checking ST Upper Face And Ball Bearing Catch Surface Depth
Courtesy of SUBARU OF AMERICA, INC.
Measure height "B" from the ST to the end of the ball bearing outer ring.
ST 398643600 GAUGE

Fig 2: Checking Height Between Ball Bearing Outer Ring End And ST
Courtesy of SUBARU OF AMERICA, INC.
Obtain the thickness of shim using the following formula to select none to two shims.
T mm = (A - 15) - (B + 15) - (0.05-0.25)

[T in = (A - 0.591) - (B + 0.591) - (0.002-0.01)]

T: Shim thickness

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

B: Height from the ST to the end of the ball bearing outer ring 15 mm (0.591 in): Thickness of ST

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