2006 TDI, 5 speed. On a 600 mile trip home today, about halfway, while fighting snow, accidents, traffic jams around Indy, I shifted from 2 - 3, and heard a bit of a grind like the synchros weren't lined up. On the next shift ATTEMPT, I couldn't get into 4th, or 5th, or even back to 3rd. It was...