I just bought a '03 accord V6 auto. and I've noticed that when the engine is cold and I go from reverse to drive, I slightly hear and feel a "clunk" after the car moves about 20-40 feet. Is there a flaw in the gears or transmission? I haven't driven an auto. in 5 yrs. but is this normal in an '03 accord? Let me know if you guys have the same experience.