Hello would appreciate some input in my issue with my 09 escape with 5000 miles on it now. Its been making a low metal sounding vibration noise at about 40 mph in top (6th) gear at 1400RPM or under. The more its worked on at the dealer the worse it gets. first they flashed the tranny computer, that changed the noise to a throbbing noise from a solid one, and second they changed the muffler which just amplified it all and is generally louder now, making is sound like its got a small hole... any suggestions or others with this issue?