Transfer Reduction Driven Gear: Adjustment

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

Fig 1: Measuring Ball Bearing Catch Surface Depth Using Gauge (ST 398643600)
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: Measuring Ball Bearing Outer Ring End Height Using Gauge (ST 398643600)
Courtesy of SUBARU OF AMERICA, INC.

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

T mm = (A - 15) - (B + 15) + 0.38 - (0.05 - 0.25)

[T in = (A - 0.591) - (B + 0.591) + 0.0149 - (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

0.38 mm (0.0149 in): Thickness of gasket

15 mm (0.591 in): Thickness of ST

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