Do you have power steering on yours?. Because that would explain it. A regular jeep with full 4x4 with full 3 way lock is hard to get to steer unless you are in snow/ice/sand or such. On a road its hard and its certainly not adviseable due to all the torque that gets wound up in the halfshafts and will end up snapping them at some point.Can't turn because of no power steering? I have lockers in all 3 axles and turns perfect at all speeds with all 3 locked. Just curious. I don't have air lockers but wish I would have put them in! Maybe next time.
I have a few video on you tube with lockers engaged. They are on this site somewhere as well i think.
But an M35 with full lockers engaged and no power steering I would say will be a handfull to steer even on sand etc. And if you are stuck in a rutt??. You are out of luck