Turbo Model

Set the vehicle on a lift.
Disconnect the ground cable from battery.
Lift-up the vehicle.
Clean the transmission exterior.
Remove the drain plug and gasket, and then drain ATF.

Fig 1: Removing Drain Plug And Gasket, And Then Drain ATF
Courtesy of SUBARU OF AMERICA, INC.
Replace the gasket with a new one, and then tighten the drain plug.
Tightening torque:

25 N.m (2.5 kgf-m, 18.1 ft-lb)
Remove the oil pan.
CAUTION: Be careful not to allow dirt or dust to get into the oil pan.

Fig 2: Removing Oil Pan
Courtesy of SUBARU OF AMERICA, INC.
Remove the magnet.

Fig 3: Removing Magnet
Courtesy of SUBARU OF AMERICA, INC.
Clean the magnet.
Remove the liquid gasket completely from oil pan and transmission case.
Remove the control valve connector.

Fig 4: Removing Control Valve Connector
Courtesy of SUBARU OF AMERICA, INC.
Remove the oil cooler pipe.

Fig 5: Removing Oil Cooler Pipe
Courtesy of SUBARU OF AMERICA, INC.
Remove the control valve body.

NOTE: Replace the control valve body as assembly, because the control valve body can not be disassembled.

Fig 6: Removing Control Valve Body

Courtesy of SUBARU OF AMERICA, INC.