Got in car, was parked up in low 4, started it up, (load of wood in trailer on back) an went to drive off, moved about a foot, had to put clutch in to roll back and start again, tried again and either the box or transfer case has locked up! While in neutral u need the clutch in or it feels/sounds like it's in gear when clutch is released! 4b stick was stuck in 4L but I managed to move it, both sticks do wat there supposed to do but car won't move. Had to disconnect tails haft to tow it home! Any ideas as to why this has happened an how to fix?