1999 Ford Ranger car makes loud howling sound at 55 mph

1999 FORD RANGER
165,000 MILES • 6 CYL • 4WD • AUTOMATIC
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FIRSTDOG
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MY Ford Ranger makes a loud howling sound at 55 mph
It is quieter at 60 mph and at 50 mph.
I have new tires on the car and they are less aggresive than the old tires.
Sometimes when traveling at 45mph and I slightly increase the speed there is a hesitation or stutter in the transmission like and air bubble? If I push the accelerator down hard it doesn't do this. If I manually shift out of overdirive it doesn't do this.
Thank you in advance for your help with my problems
Jer
Sep 26, 2010 at 12:21 PM
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JACOBANDNICKOLAS
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Does the sound change when you make turns?
Sep 27, 2010 at 10:16 PM
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FIRSTDOG
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Turning makes no difference in the sound.
Sep 29, 2010 at 7:23 PM
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JACOBANDNICKOLAS
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I am thinking wheel bearings. Have you checked brakes?
Oct 1, 2010 at 12:12 PM