when i'm idle at a traffic light i get a bad vibration sometimes. it sounds like it's somewhere around the transmission. the weird part, and also the reason i can't really trouble shoot it myself, is that it only happens when it's raining. i've never had it happen any other time. also, when accelerating i can't hear the vibration, but can feel it through the gas pedal (again only when it's raining). has anybody had an issue with this?