Procedure When Replacing Only Drive Pinion Retainer Or Converter Case

Clean the mating surface of current drive pinion retainer and converter case.
Measure and record the shim thickness that is attached on the current converter case.
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: Checking ST Upper Face And Primary Pulley Bearing Catch Surface Depth
Courtesy of SUBARU OF AMERICA, INC.
Using the current drive pinion retainer or current converter case, 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: Checking ST Upper Face And Secondary Pulley Bearing Catch Surface Depth
Courtesy of SUBARU OF AMERICA, INC.
Calculate the "LD1" using the following formula and record it.
Calculation formula:

LD1 mm (in) = Lp1 - Ls1

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 converter case, measure 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: Checking ST Upper Face And Primary Pulley Bearing Catch Surface Depth
Courtesy of SUBARU OF AMERICA, INC.
Using the new drive pinion retainer or new converter case, 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: Checking ST Upper Face And Secondary Pulley Bearing Catch Surface Depth
Courtesy of SUBARU OF AMERICA, INC.
Calculate the "LD2" using the following formula and record it.
Calculation formula:

LD2 mm (in) = Lp2 - Ls2

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

T1, T2: Difference between new drive pinion retainer or new converter case and current drive pinion retainer or current converter case

LD1: Calculated value of current drive pinion retainer or current converter case

LD2: Calculated value of new drive pinion retainer or new converter case

Difference of the case (T1) mm (in)	Shim selection procedure
0 - 0.020 (0 - 0.00078)	Select new shim of same thickness with the shim that is used on primary pulley side of the current converter case.
0.021 - 0.070 (0.000827 - 0.00275)	Select new shim of same thickness with the shim that is used on primary pulley side of the current converter case.
0.071 - 0.125 (0.00279 - 0.00492)	Select the shim 0.1 mm thinner than the shim that is used on primary pulley side of the current converter case.
0.126 - 0.170 (0.00496 - 0.00669)	Select the shim 0.1 mm thinner than the shim that is used on primary pulley side of the current converter case.
0.171 - 0.230 (0.00673 - 0.00905)	Select the shim 0.2 mm thinner than the shim that is used on primary pulley side of the current converter case.
0.231 - 0.250 (0.00909 - 0.00984)	Select the shim 0.3 mm thinner than the shim that is used on primary pulley side of the current converter case.
0.251 - 0.300 (0.00988 - 0.01181)	Select the shim 0.3 mm thinner than the shim that is used on primary pulley side of the current converter case.

Difference of the case (T2) mm (in)	Shim selection procedure
0 - 0.020 (0 - 0.00078)	Select new shim of same thickness with the shim that is used on primary pulley side of the current converter case.
0.021 - 0.080 (0.000827 - 0.00315)	Select new shim of same thickness with the shim that is used on primary pulley side of the current converter case.
0.081 - 0.100 (0.00318 - 0.00393)	Select the shim 0.1 mm thicker than the shim that is used on primary pulley side of the current converter case.
0.101 - 0.120 (0.00397 - 0.00472)	Select the shim 0.1 mm thicker than the shim that is used on primary pulley side of the current converter case.
0.121 - 0.180 (0.00476 - 0.00708)	Select the shim 0.1 mm thicker than the shim that is used on primary pulley side of the current converter case.
0.181 - 0.220 (0.00712 - 0.00866)	Select the shim 0.2 mm thicker than the shim that is used on primary pulley side of the current converter case.
0.221 - 0.280 (0.00870 - 0.01102)	Select the shim 0.2 mm thicker than the shim that is used on primary pulley side of the current converter case.

Difference of the case (T2) mm (in)	Shim selection procedure
0.281 - 0.300 (0.01106 - 0.01181)	Select the shim 0.3 mm thicker than the shim that is used on primary pulley side of the current converter case.

Part No.	Shim thickness mm (in)
32451AA000	0.1 (0.004)
32451AA010	0.2 (0.008)
32451AA020	0.3 (0.012)
32451AA030	0.4 (0.016)
32451AA040	0.5 (0.020)