I have 1800 miles on my 2010 fusion sport awd with the 3.5L motor. I notice that I get a muted rumble (similar to that of going over a rumble strip) or vibration when I hit 40mph at 1500rpm under normal acceleration or tip in, this doesnt happen any other time. Does anyone know what can be causing this so I can go back to the dealer with the problem. Otherwise, if a regular mechanic drives it , i know they will say "cannot duplicate the concern" and then the circle of time and energy wasted will start.
Please help!
thanks