My 2018 GC was working fine with no issues. The only thing that I hated about it is that sometimes (Rarely) gears 1,2,3 shift roughly at low speeds and this happens from time to time. after almost two years of using it, I have decided to take it to the dealer to fix this issue because I heard that there is an update for the transmission that makes it shift better, and while it's an update I thought nothing to lose. Now after my car sat there for a week, I came to take it home and while I was driving I noticed that new gears rough shifting and the car drivers weird (felt heavier). I parked and while using reverse gear and drive I noticed a huge bump (Jerking) when I select the gear (didn't have this before), and I started to worry, I took back to them and told them about this issue hope they reverse whatever they did or fix this annoying issue. My car was fine and everything was smooth, but only the rarely rough shifting that happens from time to time, but now it is so annoying and feels wrong.