Procedure When Replacing Only Drive Pinion Retainer Or Reverse Brake Housing

WARNING: This page is about a different variant/trim than selected.

Measure and record the thickness of primary pulley shim before replacement.
Using the current drive pinion retainer, measure depth "Lp1" from the ST upper face to the primary pulley bearing catch surface at several points and calculate the average.
Preparation tool:

ST: GAUGE (499575400)

Courtesy of SUBARU OF AMERICA, INC.
Using the current drive pinion retainer or current reverse brake housing, measure the depth "Ls1" from the ST upper face to the secondary pulley bearing catch surface at several points and calculate the average.
Preparation tool:

ST: GAUGE (499575400)

Courtesy of SUBARU OF AMERICA, INC.
Calculate the "LD1" using the following formula and record it.
Calculation formula:

LD1 mm (in) = Ls1 - Lp1

LD1: Height from the primary pulley bearing catch surface to the secondary pulley bearing catch surface

Lp1: Depth from the ST upper face to the primary pulley bearing catch surface

Ls1: Depth from the ST upper face to the secondary pulley bearing catch surface
Using the new drive pinion retainer or new reverse brake housing, measure the depth "Lp2" from the ST upper face to the primary pulley bearing catch surface at several points and calculate the average.
Preparation tool:

ST: GAUGE (499575400)

Courtesy of SUBARU OF AMERICA, INC.
Using the new drive pinion retainer or new reverse brake housing, measure the depth "Ls2" from the ST upper face to the secondary pulley bearing catch surface at several points and calculate the average.
Preparation tool:

ST: GAUGE (499575400)

Courtesy of SUBARU OF AMERICA, INC.
Calculate the "LD2" using the following formula and record it.
Calculation formula:

LD2 mm (in) = Ls2 - Lp2

LD2: Height from the primary pulley bearing catch surface to the secondary pulley bearing catch surface

Lp2: Depth from the ST upper face to the primary pulley bearing catch surface

Ls2: Depth from the ST upper face to the secondary pulley bearing catch surface
Calculate the difference of the case using the following formula with the recorded values of "LD1" and "LD2", and select the primary pulley shim.
Calculation formula: T1 mm (in) = LD1 - LD2 or T2 mm (in) = LD2 - LD1

T1, T2: Difference between new drive pinion retainer or new reverse brake housing and drive pinion retainer before replacement or reverse brake housing before replacement

LD1: Calculated value of drive pinion retainer before replacement or reverse brake housing before replacement

LD2: Calculated value of new drive pinion retainer or new reverse brake housing

Difference of the case (T1) mm (in)	Selection method of primary pulley shim
0 - 0.050 (0 - 0.00197)	Select a new shim of the same thickness with the shim that is used on the primary pulley side of the current reverse brake housing.
0.051 - 0.150 (0.00201 - 0.00591)	Select a shim which is 0.1 mm (0.004 in) thicker than the shim that is used on the primary pulley side of the current reverse brake housing.
0.151 - 0.250 (0.00594 - 0.00984)	Select a shim which is 0.2 mm (0.008 in) thicker than the shim that is used on the primary pulley side of the current reverse brake housing.
0.251 - 0.350 (0.00988 - 0.01378)	Select a shim which is 0.3 mm (0.012 in) thicker than the shim that is used on the primary pulley side of the current reverse brake housing.
0.351 - 0.450 (0.01382 - 0.01772)	Select a shim which is 0.4 mm (0.016 in) thicker than the shim that is used on the primary pulley side of the current reverse brake housing.
0.451 - 0.550 (0.01776 - 0.02165)	Select a shim which is 0.5 mm (0.020 in) thicker than the shim that is used on the primary pulley side of the current reverse brake housing.
0.551 - 0.600 (0.02169 - 0.02362)	Select a shim which is 0.6 mm (0.024 in) thicker than the shim that is used on the primary pulley side of the current reverse brake housing.

Difference of the case (T2) mm (in)	Selection method of primary pulley shim
0 - 0.050 (0 - 0.00197)	Select a new shim of the same thickness with the shim that is used on the primary pulley side of the current reverse brake housing.
0.051 - 0.150 (0.00201 - 0.00591)	Select a shim which is 0.1 mm (0.004 in) thinner than the shim that is used on the primary pulley side of the current reverse brake housing.
0.151 - 0.250 (0.00594 - 0.00984)	Select a shim which is 0.2 mm (0.008 in) thinner than the shim that is used on the primary pulley side of the current reverse brake housing.
0.251 - 0.350 (0.00988 - 0.01378)	Select a shim which is 0.3 mm (0.012 in) thinner than the shim that is used on the primary pulley side of the current reverse brake housing.
0.351 - 0.450 (0.01382 - 0.01772)	Select a shim which is 0.4 mm (0.016 in) thinner than the shim that is used on the primary pulley side of the current reverse brake housing.
0.451 - 0.550 (0.01776 - 0.02165)	Select a shim which is 0.5 mm (0.020 in) thinner than the shim that is used on the primary pulley side of the current reverse brake housing.
0.551 - 0.600 (0.02169 - 0.02362)	Select a shim which is 0.6 mm (0.024 in) thinner than the shim that is used on the primary pulley side of the current reverse brake housing.