Hello again,
While driving down a multiple lane expressway I noticed a repetitive “whump, whump, whump, whump” that would speed up or slow down with the car. The car is a 2009 Ford Escape Hybrid “All Wheel Drive” with 80,000 miles on it. The tires, Cooper CTS 235 70 R15’s, are pretty new, they were installed at 70,000 miles and have been rotated at 76,500. The noise is not very loud but noticable by myself and passengers. About 4 years ago one of the OEM Michelins developed an abnormal wear pattern that caused this noise. The vehicle had a 4 wheel alignment along with the rotation at 76,500. No reason to believe it was “knocked” out of alignment since then. Any thoughts as to what is causing this noise and what we should to to remedy it? Thanks!