Question about Ford F-150

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Transmission shifts rough in Overdrive but not in Drive

My 1991 Ford F150 shifts really rough when in Overdrive but shifts OK when in Drive. Is this a sign of a faulty transmission or could something else be causing this?

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  • Mike Butler
    Mike Butler May 11, 2010

    Believe it or not, had one do same, but shifted erratic in & out of overdrive. Turned out to be 1 or 2 carboned up spark plugs, and 2 bad plug wires. the weak spark was causing it. Didn't feel it in any other gears just when at highway speeds going in & out of overdrive.

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  • 55 Answers

Yes itcan or it may just be the solenoid for that overdrive. make sure fluid is maintained and no mounts are broken

Posted on Apr 24, 2009

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