On my way home today, the gearbox decides to jam in gear, felt like the box had picked up both 5th and reverse, wouldn't move under power so had to roll to the side of the road. So I sit there wondering what to do next, turn it off and wait for help to arrive. Whilst waiting the gear stick is able to move like the box was out of gear. I start the ute for one more try and can get 3rd so limp home. Throw the ute up on stands when I get home to see what damage has been done (not making any abnormal noise) and find nothing. Decide to drop the oil and check for lumpy bits but don't have the correct torq bit. whilst checking the box out, notice a bolt above the reverse switch that is about 3-4 turns out, not sure but maybe something to do with locating the selector rail or something similar?? Tighten it up and box is working fine again! Has anyone else encountered this or is there more to it that I've missed? Should I still be worried