The problem re-occurred and I am certain moisture in the transmission wire harness was not the cause. I still don't know what is causing the problem but I found a hack solution. I took a rubber mallet and gave the mount, where the transmission solenoids are, a few solid thumps, put in 2 new 10 amp fuses and she has been working fine......so far (PFM). I know that is a bit of a BS solution but figured I post it anyway, because it worked and beats a $2000 tow bill.