'64 Barracuda trans/shift lines question?

If the car sits for long periods of time, the torque converter sends the fluid back into the trans pan area and overfills the transmission, which results in leaking fluid just as you describe...in puddles...which are hard to track down.

If you have old brittle seals, which are the most common thing to go over time, then the trans will leak at the shifter selector which i mentioned a few posts above (which is where the kickdown/throttle cable go into the transmission, driver side, right above those cooler lines)

1...check your fluid level in neutral on a level surface with the car running
Is it full, overfull, normal, low, etc
2. Get some gaskets...tail shaft seal, trans pan seal even the little tiny seal that goes inside the speedo housing (which is that cable going to the back of your trans), as well as the shifter selector seal and a new speedo seal (there are two seals for the speedo housing)
3. Make sure your trans pan is torqued correctly, as over-torqued pans are common (which people do to stop leaks which bends the pan)

I chased leaks for many moons on my 65 valiant, so i replaced all these seals i mentioned above and not a drop emits from my trans to this day!