I have an automatic vehicle -- My car was running well this morning, until about midday I decided to change the oil of my car, as well as flush the radiator out, however a couple of hours later I started my engine and put it into drive(automatic) but it would not move. Has it got something to do with me spilling oil or water on the engine parts??? Note: I topped up my transmission fluid about two days later and now the car is going forward etc but it's still not back to normal. Help????