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    Clunk, bump or hard shift at about 35 mph

    Just bought a 2011 Expedition 2 wheel drive xl w 79,000 miles and the 6r80 transmission. About 2 weeks later started experiencing a random clunk, bump or hard shift at 35 mph. Not sure what to call it for sure. Seems to be doing it more and more but not every time we pass through 35 mph...
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