Oil Pump: Removal

Remove the transmission assembly from the vehicle. < Ref. to REMOVAL , Automatic Transmission Assembly.>
Extract the torque converter clutch assembly.
< Ref. to REMOVAL , Torque Converter Clutch Assembly.>
Remove the input shaft.

Fig 1: Removing Input Shaft
Courtesy of SUBARU OF AMERICA, INC.
Lift-up lever behind the transmission harness connector and disconnect it from stay.
Disconnect inhibitor switch connector from stay.
Disconnect the air breather hose. < Ref. to REMOVAL , Air Breather Hose.>
Remove the oil charger pipe. < Ref. to REMOVAL , Oil Charger Pipe.>
Remove the oil cooler inlet and outlet pipes.
< Ref. to REMOVAL , ATF Cooler Pipe and Hose.>
Separation of torque converter clutch case and transmission case sections < Ref. to REMOVAL , Torque Converter Clutch Case.>
Separate transmission case and extension case sections. < Ref. to REMOVAL , Extension Case.>
Remove the reduction drive gear. (MPT model)
< Ref. to REMOVAL , Reduction Drive Gear.>
Remove the center differential carrier. (VTD model) < Ref. to REMOVAL , Center Differential Carrier.>
Remove the reduction driven gear. < Ref. to REMOVAL , Reduction Driven Gear.>
Loosen the taper roller bearing mounting bolts.

Fig 2: Loosening Taper Roller Bearing Mounting Bolts
Courtesy of SUBARU OF AMERICA, INC.
Place two wooden blocks on the workbench, and stand the transmission case with its rear end facing down.
NOTE:
- Be careful not to scratch the rear mating surface of the transmission case.
- Note that the parking rod and drive pinion protrude from the mating surface.
Fig 3: Standing Transmission Case On Wooden Blocks
Courtesy of SUBARU OF AMERICA, INC.
Remove the oil pump housing and adjusting thrust washer.

Fig 4: Removing Oil Pump Housing & Adjusting Thrust Washer
Courtesy of SUBARU OF AMERICA, INC.
Remove the oil seal retainer.
Also remove the O-ring and oil seal (air breather).

Fig 5: Removing Oil Seal Retainer
Courtesy of SUBARU OF AMERICA, INC.
Remove O-rings from oil pump housing.
Remove the drive pinion assembly.