im trying to figure out whats going on. when im in park and the engine is at idle speed, everything is fine, runs fine. when i put it into gear i get an inconsistant studder that kinda shakes the whole car. when im accelerating its not there. when im crusing its not there. its only there when im in gear not going anywhere. it feels like a missfire, but im not getting any kind of CEL. any help would be great.