2006 Ford F150 whirring

2006 FORD F-150
119,000 MILES • V8 • 4WD • AUTOMATIC
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MCK57
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The Car Sound Problems section on this site indicates that a whirring noise could be the result of a failing differential gear. Would that cause the transmission to feel as if it were slipping at a lower RPM?
Sep 12, 2009 at 8:33 AM
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JACOBANDNICKOLAS
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Can you tell aprox where the sound is coming from? Also, a bad differential won't cause the trans to slip or feel like it's slipping.
Sep 16, 2009 at 8:06 AM
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MCK57
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The sound is coming from the front, but hard to pinpoint exactly where since it only happens when I take it out of park.
Sep 16, 2009 at 6:01 PM
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JACOBANDNICKOLAS
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If it only happens when it is out of park, does it do it when you are stopped too?
Sep 16, 2009 at 7:51 PM