Procedure When Replacing Only Drive Pinion Retainer Or Reverse Brake Housing

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

Clean the mating surface of current drive pinion retainer and converter case.
Measure and record the shim thickness that is attached on the current reverse brake housing.
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.
ST 499575400 GAUGE

Fig 1: Measuring Depth LP1 From ST Upper Face To Primary Pulley Bearing Catch Surface
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.
ST 499575400 GAUGE

Fig 2: Measuring Depth LS1 From ST Upper Face To Secondary Pulley Bearing Catch Surface
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.
ST 499575400 GAUGE

Fig 3: Measuring Depth LP2 From ST Upper Face To Primary Pulley Bearing Catch Surface
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.
ST 499575400 GAUGE

Fig 4: Measuring Depth LS2 From ST Upper Face To Secondary Pulley Bearing Catch Surface
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 recorded values of "LD1" and "LD2" to obtain the positive number to select the shims.

Calculation formula: T1 mm (in) = LD1 - LD2 or T2 mm (in) = LD2 - LD1

T2: Difference between new drive pinion retainer or new reverse brake housing and current drive pinion retainer or current reverse brake housing

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

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

Difference of the case (T1) mm (in)	Shim selection procedure
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)	Shim selection procedure
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.

Part No.	Shim thickness mm (in)
32451AA050	0.1 (0.004)
32451AA060	0.2 (0.008)
32451AA070	0.3 (0.012)
32451AA080	0.4 (0.016)
32451AA090	0.5 (0.020)
32451AA100	0.6 (0.024)