727 driving me crazy with leaks!

has it been sitting for a long time? maybe all winter?

when they sit for a long time the torque convertor drains back into the case and if it sits long enough the case will over fill and drain through the vent......different convertors drain back at different rates.

as soon as you start it the fluid rushes back into the convertor to start the cycle all over again

i would check around the vent