Lift one tire off the ground as to alleviate any tension within the gears? There is only one bolt and the rest are nuts on studs. They all secure the locker to the housing. Be sure you got all of the fasteners from the top of the locker off. i just popped mine with a dead blow and it slid out just fine.
If you look at the below picture the actuator is on it's side. The the bottom most hole on the left which is slightly recessed is just to bolt the wiring and shield onto. The one just above it on the left and the two round holes on the right are all fasteners.