Hey can someone help diagnos my 2000 Eclipse, GS? I was driving like shit because my spark plugs were all screwed up and one wasn't even firing, the problem was that my spark plug wells were filled with oil. I replaced my spark plugs and it ran good for a few weeks. Now when I am in drive and stopped my car shakes violently...it feels like a shaking under my car, makes my butt shake (not like a stearing wheel or door shake). Sometimes my car clumsly shifts gears or slips up on gears, not all the time (BY THE WAY ITS AUTOMATIC). Im assuming the shaking is from the transmission but not sure, any diagnostic suggestions?