Just to be clear, the hole pictured is to drain the torque converter, but it is NOT the torque converter drain, just the access hole to get to the drain plug. I agree with '85 CV regarding the source of the leak, but I would also check for a loose converter drain plug just in case. It's a long shot, and they don't often back out, but stranger things have happened. The drain plug can only be seen through that hole with the missing rubber plug, and only then when the engine and torque converter are "indexed" so that the plug lines up with the hole in the torque converter cover. Rotate the engine with the crankshaft dampener bolt until you see the plug. It is small and easy to miss.