The 1992 Subaru Legacy 2.2L does
not have a traditional transmission filter in the same way many automatics do. Instead of a replaceable filter, the automatic transmission uses a screen inside the transmission pan. This screen is cleaned or replaced during a transmission fluid and filter service (which in this case means replacing the pan gasket and the screen).
To access this screen, you'll need to remove the transmission pan. This is a relatively straightforward job but requires some mechanical knowledge and the right tools. You'll need to drain the transmission fluid first.
In short, there's no separate, easily accessible filter. The "filter" is integrated into the transmission pan.
