My mother in law bought a 12' titanium sportpackage during christmas after she saw mine.
I got to see it the first time this weekend and it drives Horrible! Severe chatter and grinding noise in between gears. I had her drive mine to see that it is not normal.
Good news is she took it to the dealer today and they gave her a loaner and are repairing the transmission. I have not seen the paperwork but I will find out what they found and what they did and give you all the outcome....
Cross your fingers for her and stay tuned.