I left this thread for a long time since it didn't seem to be going anywhere. But I almost had one of my own the other day to add. Older ATV, drain plug for the transmission is 1/2" hex head, but you can't even see it. You have to feel for it from the bottom through about a 1-1/2" hole through the frame. Found it and got a socket on it, but ..... slipped. Tried again, same thing. Went and got a different socket, repositioned myself as best I could to get the most uplift on the ratchet and ability to turn it more squarely and ....... success!!! Broke it lose, pulled it out with no further issue. Hope I don't ever have to do it again since I didn't replace it.