I was actually coming on here to write about my transmission issues, too. I have a 2023 with the 6.2 engine. For the first 9ish months of ownership the trans was perfect… could almost never tell when it changed gears, and putting it into Park was the same - couldn’t feel a thing. Starting about 3 months ago when I would put the truck in Park, I would get a clunk and could feel it through my feet. Took it to the dealer at around 8,500 miles and they said they couldn’t replicate the issue, go figure.
Now at just barely past 11K miles, I’m getting rough shifting at lower speeds and sometimes it’s getting stuck in gear when I take my foot off the pedal to coast before slowing down for a stop… the rpm will just hold around 2,000 for like 5-8 seconds even though my foot is fully off the pedal. And now putting the truck in to Park will sometimes clunk so hard it throws my shoulder off the seat by a full inch. But it’s so sporadic. Sometimes I can put it in to Park and it’s smooth as butter… can’t feel anything happen, and then the next 2-3 times parking in the same exact spot in my driveway it’s that awful clunk and makes the whole truck jerk, then the next time it’s flawless again. Doesn’t matter how I do things - foot fully on the brake and making sure there’s no rocking back and forth; putting on the parking brake first or not putting it on first; level ground; incline ground; decline ground… there is no rhyme or reason to when it does, or does not, happen.
Taking her in to the dealership again tomorrow, and if they tell me again that they can’t replicate the issue, I’ll probably trade her in. I’m about to make a couple 1,800 mile drives, and I’m not doing that with a vehicle whose transmission I have no trust in any longer.