Hey guys, I have a new to me 2021 XLT 3.5 Sport with 14K on it. Most of the time when I'm driving I'm in ECO mode. I keep getting this kind of clunk, or thump. It kinda sounds like it is coming from the back, but I'm not sure. Usually happens when I come to a stop and really almost always if I'm stopping on a grade pointing downhill. I took it into the dealer and they said they "re-porgramed" the transmission. The tech said that "since you bought it used, the transmission learned...
21 F-150 Clunking sound when stopping.
21 F-150 Clunking sound when stopping.