The other day, I put my auto in to reverse to reverse out of a parking spot and it didn't want to go anywhere. It was as if the handbrake was on. I put it back in park and put it in reverse again and it stil didn't want to move. I gave it a little more throttle and it reluctantly reversed but I could feel juddering as it did it. The sort of juddering you get when a 4x4 has its diffs locked and you are turning a tight circle (a bit specific I know). But the it drove forward fine and then reversed