Highmiles

I am getting ready to pull the transmission (2000 Odyssey) to solve a leak that shows up at the top of the transmission between the transmission and torque converter housing. (It is not the piping for the cooler...wish it was...)
I am begining to understand that the fluid must be leaking from the transmission into the housing area from some seal on the transmission or related to the torque conveter. That is, it shows up on the outside at the seal between the torque converter and the transmission, but that is not the root of the leak.
What seals should I plan to replace once I pull the transmission? The parts diagram I looked at appeared to only have bearings and bearing clips. What am I missing?
Thanks.