a-904. Still leaking after rebuild! :(

the sealing washers on the pump bolts, were they metal or fiber?
Did you check the fluid level to see if it was overfull.
If it drips while running, in nuetral, the pump seal could be an issue, but a restricted cooler flow can also cause it to push out past the seal. its going to go somewhere if the cooler flow is restricted.

Do you have aftermarket trans cooler, or just into the rad?