Unless you've verified that the solenoids are indeed faulty you're opening a can of worms in an attempt to replace them.
You Do realize where they are located?
they are not in the pan......one has to remove the trans rear cover to get at them. That in itself cannot be done in the car, even with the trans support removed there's not enough clearance to get the cover off & lift it out from the top or drop out the bottom while in the car.
Even if you went to the trouble of removing all of the paraphernalia in the engine bay above it the cover would contact the inner fenderwell preventing you from lifting it out.