Driving in low range when transmission locked up. Engine runs fine but the vehicle will not move and shifter will not move to get it into neutral No noticeable effect when switching between 2 wd, 4wd or turf mode. Had to pick up the rear end with loader to get it back to the cabin as the rear wheels are locked. Rear wheels will only rotate opposite direction when off the ground. Was making a loud clicking noise just before it happened and saw intermittent check engine light the day before. Any ideas what has happened? How can I get it disengaged so the wheels will turn so I can push/pull it onto a trailer for transport? Help!?