I'm having the same problem with a new '06 Impreza wagon (automatic though). I can feel the vibrations at three different times... 1) Car in Park and engine on, 2) Idle, foot on brake, car in Drive, and 3) Any time I quickly accelerate and the RPM's are anywhere from about 1000 to 4000. I just took it in to the dealership for service, but they came up with nothing. You can feel the vibration better/hear the rumbling noise louder from the driver's seat.
Does anyone have any other suggestions I could give to the service technician? So far the gist I'm getting from posts about this topic seem to be that its an inherent problem with Subaru's.
Thanks in advance for any help!
