My 2007 RTL has 122k miles and I have an issue where sometimes it won't go in reverse. It will just make a sort of grinding sound. What is strange is that it doesn't always do it and when it does I can put it in drive and move a couple feet and try again, and then it usually works. I've checked the transmission fluid and it is fine. Pretty sure that it will certainly need a new transmission but figured I'd post to see if anyone else has experienced this. Not looking forward to expensive repairs!