Hi, I'm new to this forum. I have a 1994 Subaru legacy wagon 2.2 engine, non turbo automatic transmission. I am a second owner and had it since 2000. It hardly requires any work with the exception of general maintenance. That said, I need some input. When going down the road it quickly brakes like it has abs, which it doesn't. The brake pedal vibrates but it's being applied. This has happened on dirt road, highway and residential area, different speeds, but only three times, not all the time. My mechanic thinks it's the transmission, but we have no problems with it shifting. HELP