2000 Ford Explorer

Dear Doctor: I have a 2000 Ford Explorer 4WD with an automatic transmission. At about 62 to 65 mph a “grinding” occurs. It feels like I’m driving over a rough road and I can feel it in the front-end. As soon as I feel it, I decrease speed and it stops. I keep my speed below 60 so this doesn’t occur. Does something happen in the gears at this speed that is causing this sensation? Ted
Dear Ted: Out of balance tires, axles, drive shaft, and universal joints can all cause vibration feedback when traveling at 60 mph. Transmission overdrive and lockup torque converters can also cause vibration. A light spark plug misfire under a lean cruise can also be a culprit. You should let a technician take the truck out for a road test.

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