Am trying to determine if the transmission is bad before I start buying the drive block and a belt or whatever else I may need. I notice that the gear box turns CClockwise but not Clockwise from underneath. I tried to remove the drive block with a chisel but now must resort to breaking it to get it off! I understand (from blogging) that once it is off and you can visibly see the inner shaft whether it is turning or not. If it is not you are looking at a bad transmission?