Been to Dealer for diagnosis. Unsuccessful. Car is quiet in town under 35 mph, and at high speed when turning LEFT on freeway. No clunks or clicking. sounds like a plane. We're thinking wheel bearing? Sound does not go away when put in neutral at high speed.
Car has a loud vibration coming from driver side when between 25-60 mph. on 1997 Mercury Sable
agree with 1&2
1 more answer , 1 more comment
Definitely sounds like a wheel bearing. Probably the driver's side front bearing. Dealer may not have taken it for a test drive and thus, did not discover the problem that would only show under those circumstances.
I agree with #1 but you have to be careful when diag wheel bearings because a lot of times it sounds like the left side but it is the right side