Unfortunately I have the same humming noise as many of you describe. Right at exactly 61 mph and 2,100 on the RPM. You can only hear it under slight load and goes away right after 62 mph. It's kinda annoying, but do you guys think I should waste my time at the dealer trying to get this fixed?? Car has 38,500k on it, but I also have the 7/70 extended warrenty.