Don't know the proper names for the parts of the rear tiller. But when I installed my rear tiller on my tractor it was hard to install, had to spray WD40 on spline coming out of the tractor. The small ball bearings seamed stuck, but after spraying they freeded up, now wanting to remove the tiller can't get it to release. I have pulled the tiller away from the tractor now the driveline shaft is just hanging on to the tractor. I have tried to uninstall by compressing the spring loaded collar and pulling but not working. Any ideals???