Resurrecting somewhat of an old thread here but I get this exact same problem and I'm wondering if anyone has managed to resolve it. I have a 2008 Ford Edge with 96,000 km on it. It's in immaculate condition.
When I slow down to about 10 km per hour from about 30 to 50 km per hour and then step on the gas to speed up again right away, I get a "jerk' or as it is referred to here, a "hard shift" (while accelerating slowly from already moving fairly slowly). It is hard enough to move me in my seat which is why I think this is also a safety issue aside from a mechanical one. I've looked at many other threads about this, seems like LOTS of people with all different years of Ford Edges and even the MKX have this problem. My vehicle has done this from the day we bought it.
It doesn't happen all the time but when it does, it is so annoying. If it's something as simple (?) as replacing the transmission sensors (as someone noted in one of the threads here in this forum) as opposed to replacing the whole transmission, I could live with that. I finally called Ford Canada today about this issue and they have "no information" available about this problem which is really interesting because it seems to be so widespread. They also told me that they do not monitor the Internet as there could be "Ford haters" in these forums! I'd say most of the people here are Ford LOVERS. I don't expect them to monitor the Internet but hello... do we have a problem here or what? I see no TSB about this anywhere, including the Ford Canada site.