I got the P0340 code. I did some research in this forum and thought it wouldn't be to bad to fix. I was in the process of replacing the sensor when something looked off. It looked like the synchronizer had been rotated just a bit. I'm guessing when synchronizer locked up and before the teeth broke off the gear it rotated it. I got the paint marker out and marked as it sat so I could loosen and pull it out. When it came out, I found out why I was getting P0340. It's locked up solid. It did run for a bit after the first time it died. What do I look for now? Am I going to need to tear into the engine and look for damage?