Oil Pump Housing: Adjustment

Using the ST, measure the length "L", from the mating surface of the transmission case to the recessed portion of the high clutch drum.
ST 398643600 GAUGE

Fig 1: Identifying Measured Value Using Special Tool
Courtesy of SUBARU OF AMERICA, INC.
Using the ST, measure the length "L" from the oil pump housing mating surface to the top surface of the oil pump cover with the thrust needle bearing.
ST 398643600 GAUGE

Fig 2: Measuring Length From Oil Pump Housing Mating Surface To Top Surface Of Oil Pump Cover
Courtesy of SUBARU OF AMERICA, INC.

Calculation of total end play

Select a suitable bearing race from the table below and adjust the clearance "C" so that it will be within 0.25 to 0.55 mm (0.0098 to 0.0217 in).

C = (L + G) - L

C	Clearance between concave section of high clutch and end of clutch drum support
L	Length from case mating surface to concave portion of the high clutch
G	Gasket thickness [0.28 mm (0.0110 in)]
L	Height from the oil pump housing mating surface to the upper surface of the oil pump cover with the thrust needle bearing.

Fig 3: Identifying Gasket Thickness

Courtesy of SUBARU OF AMERICA, INC.

After completing the total end play adjustment, insert the bearing race into the high clutch race. Apply vaseline, and install the thrust needle bearing to the oil pump cover.
After correctly installing the gasket to the case mating surface, carefully install the oil pump housing assembly.
NOTE:
- Use a new gasket.
- Be careful to avoid hitting the drive pinion against the inside of case.
Install both parts with dowel pins aligned. Make sure there is no clearance at the mating surface.