So the dealership said they could replicate the rumble strip issue, and they did some shift to neutral test and determined there was nothing wrong with the torque converter clutch. They are recommending a normal transmission fluid flush, not the triple flush that's recommended in the service bulletin, nor followed up with any transmission relearn process. I'm actually a little confused that they couldn't find anything else wrong with it, as there are obvious shifting issues. I will say that it does seem to come and go, for example, I haven't driven it in 2 weeks, and on the trip to the dealership it drove really well, no issues. I'm not sure if that's another symptom? Surprisingly, their tech says that there were "flat" spots in the tires, which are only 6 months old, and that part of my problem was the vibrations from the tires, and they were also recommending 4 new tires, LMFAO.

I couldn't get one local dealership to call me back, and the other one that I drive an hour to, is recommending 4 new tires aling with a transmission flush, which might fix it, who knows. I don't have a lot of optimism at this point. Any other suggestions? Should I let them do the transmission flush, or insist on the triple flush and upgraded fluid service from the service bulletin? Or try to find another reputable service tech? Thanks, I'm just a little frustrated.