A few weeks ago my Gen2 Outback started to vibrate a little when in Drive but stopped, eg a set of lights.
Shift to Neutral and the vibration is gone.
Car idles smooth in both Park and Drive, no erratic movement of the tacho.
New leads, spark plugs.
No error codes.
New engine / trans mounts.
IACV and TPS both working perfectly, have tested with multimeter.
Car drives perfectly smooth and fuel consumption has not changed.
Transmission fully flushed and operation as normal.
Thoughts?