Add another Lincoln to the list of weird shift behavior, lol. I do NOT think mine is the same issue, but possibly related. My issue is that the shift from 1st to 2nd is occasionally way too harsh. It only affects the 1-2 shift. All others are fine. It only happens from a launch or sometimes if I accelerate hard out of a corner (Like pulling onto a main road.) It's not a prolonged shift, it's pretty quick, but it kind of shakes the car. You can hear it, and feel it all through the car. I asked Brad to soften up the shift and he took care of it. I also ran a little extra ATF, and it's very rare that it happens now.
Fun facts: When Brad looked at my logs, it didn't appear there was anything catastrophic. He said it looked like it was shifting faster than it should, and he did some of that AJP sorcery which seems to have fixed it for the most part. Since it happens on hard launches and around corners, I do believe that g-forces are a culprit. From the ATF being pushed to the back or to the side of the transmission. I'm tempted to just keep adding fluid till the problem disappears completely, lol. But I don't want to over fill too much.