My 5740C is doing this now more often, getting gears stuck when I shift from 2nd to 3rd. At that point my tractor then gets stuck in 2nd gear until I get under it and free up the linkage. My son in law, a diesel mechanic was in town this weekend and told me that it's due to wear, but not near bad enough to warrant taking it apart and fixing anything. He suggested to me that when I shift from 2nd to 3rd that I take my shift lever stick to neutral first and then take shift lever stick all the way over to the right and then up into 3rd, rather than going straight from second to thind as I have been doing since tractor was new. I'll try that and see if it helps as gfetting jammed in 2nd gear is getting annoyiong now. Again, it's a quick fix to get the linkage unjammed but it's becoming a real PITA.