Non-Turbo Model

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Remove the transmission assembly from the vehicle. < Refer 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 Special Tool (Non-Turbo Model)
Courtesy of SUBARU OF AMERICA, INC.