Not saying those is the problem, but on my f150 that was a holdover I ended up having a bad rim. This was after about 4 months going back and forth. You can try moving the fronts to the back and see if that gets rid of some of the shake. Mine was also brand new and it was very irritating and the dealership actually changed service managers a few times during the process (absolute pain) but it got resolved eventually. I have not been back to that dealership again. Good luck, Mike.