New to the forum, I also have a 22 Tucson, 1900 miles on it. I also have experienced slight bucking while at low speeds, it hasn’t concerned me too much until this morning. This morning I was driving, first drive of the day, accelerating slowly, when shifting, either second to third, or third to fourth, it felt like it momentarily hit neutral. The revs went higher than they should have, just for a quarter second, then dropped in to the next gear, hard! I also have read others posts on this and another forum about the bucking at slow speeds, but so far everyone who’s tried to have a dealer look in to it has come up empty. So it seems like a waste of time to bring it in with no CEL’s to check.