I have had a slight vibration in my 300C at 55 MPH from the day I purchased the car. The vibration feels like it is coming up from the driveshaft? and through the "gas pedal" and drivers seat. When I accelerate past 55, the vibration goes away. My Chrysler dealer kept the car for two weeks, worked with the transmission, changed some computer settings, worked with Chrysler factory engineers with no success. This work was done at 18000 miles on the car. They indicated that it could be the tires. Not the tires, I put Michelin's on the car and they are great but does not help the vibration problem. I was told by a Chrysler salesman that the early 300C's had a problem with the engine to transmission hook up?? My 300C was purchased in October 04". I love the car, and would appreciate any suggestions

MoparMan
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