cahhtravis4
New Member
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. Haven't owned it long enough to know if happening more when going up a grade or not but many of the times that has been the case. Not sure if relevant. Update: Just took it out for drive and figured out that 35 to 40 is the magic spot and it happens when you get to about that speed and then let up on the accelerator and then accelerate again after just letting up. Don't think it happens when you just steadily accelerate through the speeds. But if you have to slow because of traffic and then hit again quickly it happens but not at other speeds so far. Any ideas about what could be going on? Hoping the fix isn't a whole new transmission.
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