is it just a matter of taking the pan off and getting to the solenoid ?
Yes.it is fairly easy,all you have to do is remove the pan and remove it.here is the shop manual step.#3 is the EPC solenoid.
On the diagram , there are two number 1's I assume these are the shift solenoid electrical connectors
number 2 is the Tcc electrical connector
and 3 is the Epc