My G6 has a very noisy and Clunky transmission. I have had it to the dealer 3 times and I wrote and called GM. I believe there is nothing that can be done. Since it is the first application for this trans in a GM car, I think they just screwed it up. I am going to seek a buyout because I will not put up with the way this sounds. It really shifts poorly and cluncks into gears.