2-4 Brake: Construction
WARNING: This page is about a different car, the 2013 Subaru Forester, 2012 Subaru Forester, 2011 Subaru Forester, and 2010 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
The 2-4 brake consists of a 2-4 brake piston retainer, 2-4 brake piston, return spring, pressure plate, drive plates, driven plates, and a snap ring that fits in a housing formed in the transmission case.
This brake is engaged by the hydraulic pressure from the control valve and locks the front sun gear when the 2nd or 4th gear is selected.