Is the internal trans filter only present in WRX/Impreza?
I own an 02 Legacy GT. The Subaru Service manual I have does not make a reference to an "internal" transmission filter, only the external one labeled "ATF Filter".
I had the dealer perform a trans fluid exchange at 30,000(dealer said I could wait until 60K, but I thought, why risk it? Fluid is cheap!)
If an internal filter was present in my Legacy, it was not changed at that point. If I have one, looks like I will be having tranny service again soon!