Oil Pump Housing: Adjustment

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

Fig 1: Oil Pump Rotor Assembly Specifications
Courtesy of SUBARU OF AMERICA, INC.
Using ST, measure the distance from the oil pump housing mating surface to the top surface of the oil pump cover with thrust needle bearing.
ST 398643600 GAUGE

Fig 2: Measuring Distance From Oil Pump Housing Mating Surface To Top Surface Of Oil Pump Cover Using Special Tool
Courtesy of SUBARU OF AMERICA, INC.
Calculation of total end play
Select suitable bearing race from among those listed in this table so that clearance C is in the 0.25 to 0.55 mm (0.0098 to 0.0217 in) range.

C = (L + G) - l

Fig 3: Bearing Race Description Table
Courtesy of SUBARU OF AMERICA, INC.

Fig 4: Identifying Bearing Race Dimension
Courtesy of SUBARU OF AMERICA, INC.

Fig 5: Thrust Needle Bearing Specifications
Courtesy of SUBARU OF AMERICA, INC.
After completing end play adjustment, insert the bearing race in the recess of the high clutch. Attach the thrust needle bearing to the oil pump cover with vaseline.
After correctly installing the new gasket to the case mating surface, carefully install the oil pump housing assembly. Be careful to avoid hitting the drive pinion against the inside of the case.
Install both parts with dowel pins aligned. Make sure no clearance exists at the mating surface.