This is most likely a pan gasket, but most all these seals will start to leak after sitting for a while. However, if the vehicle is sitting on a slant, then the pan gasket is most likely as the pump/converter seal normally doesn't leak if it is just sitting still. Normally when these are leaking, it requires moving the vehicle to get the fluid to move around and then when you park it again, they start dripping.
The pan seal will leak if there is fluid just resting against it.
Either way, I would suggest checking the fluid and changing it if needed then address a different leak if the pan gasket was not it.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Below is the process from the manual for the pan but it is pretty straight forward.
Image (Click to make bigger)
SPONSORED LINKS
Sunday, October 3rd, 2021 AT 2:36 PM