vibration in drive

What is your question?

My car has a vibration when it's in drive with the brake on. It doesn't vibrate in neutral or reverse, but does slightly when warming up in park. It does seem to vibrate when I take a sharp left turn. I did have a rear-end collision in August, but didn't notice the vibration until I took it home from the body shop. So far I change two motor mounts and did a major tune-up, but that hasn't solved the problem. Any idea what's going on and if the vibration can lead to other problems? Thanks for the help and Merry Xmas, Happy New Year!