I've heard somewhere that there is a problem with the weights on the secondary clutch not releasing properly. Also that JD has redesigned the clutch addressing this problem. I don't know if this truth or not. I would advise checking with your dealer to check on this. Possibly an issue to be covered by warranty. Like someone once told me " You miss 100% of the shots you don't take." Go for it, ask the dealer. By the way I have a 550 with 18 hrs. with the same problem.I have a Gator XUV 550 and it will not shift out of gear unless you turn the engine off. It has only 43 hrs on it, but warranty ran out last month. Any ideas?