I just got an 05 cts automatic with 80000 miles. I recently noticed a loud clanking noise when I go from park to drive or any gear for that matter and vise versa. it doesn't do it every time but seems to be happening more more often. Can anyone tell me what is going on with my car. It's under warranty still going to take it in but want to know a little bit about it so I am not completely clueless when I do. SOMEONE PLEASE HELP!!!:-(