Make sure where the oil is leaking from FIRST If it is leaking from the rear main seal onto the back of the crankshaft flange it will sling the oil out onto the converter flex plate and converter. If it is not doing that it is NOT the main seal
I've seen more than one rear main seal replaced when it wasn't leaking
IHTHs, let us know what you find
The rear main seal can not and will not pour oil out unless one of the side seals is really messed up
I have had the rear cam plug leak, one of my friends had a rear oil galley plug leak and I have seen many valve cover gaskets leak after being ran several times without being retightened