automatic transmission vibrates when is cold
3 Answers
I do not know how cold your area is now but I would be waiting for the car to warm up to the point where you don't have this vibration. You may end up damaging something. Extreme cold causes all sorts of problems.
the temp in the morning, ussually is +10° Celsius.
I would try a fluid and filter change. If that does not do it, allow enough time for the car to warm up. 10 degrees C is not cold. Your transmission may be on the way out but you may be able to extend the life by warming it up first.