Non-Turbo Model

Remove the transmission assembly from the vehicle. < Ref. to REMOVAL , Automatic Transmission Assembly. >
Use the ST to lock the crankshaft, and remove the drive plate.
ST 498497300 CRANKSHAFT STOPPER

Fig 1: Locking Crankshaft Using ST (Non-Turbo Model)
Courtesy of SUBARU OF AMERICA, INC.