This was the closest post I could find to my recent issue, so rather than starting a new thread, thought I would start here.
Just completed my first major trip, about 6.5hrs of driving. All in all, this thing is great, comfortable, super peppy, great response. Only three issues I had, Sync 3.4 usability, crosswinds that made this thing feel like I was driving an RV, and the tranny. All in all the tranny was unbelievable, until.... Was doing about 82mph, 10th gear, had a semi in the right lane that needed to get over for someone merging on. Car was driving via ACC, slammed on the gas, and had this nasty hard shift that basically shook the car. It found 8th gear and accelerated fine, but it scared the wife it was so bad and frankly, I didn't like it much.
Anyone experience this? Is it normal with this 10speed? Was running in normal 2WD mode, no programming, etc. subsequent slams produce similar responses. Never had issues like this so far, had it since Nov.