Bob, this sounds just Krazy!
Have you tried to hook up a scan tool that can read the actual problem that is setting the P0700?
You'll need to address the trans controller directly and forget about P0700. The only reason P0700 pops up in the engine controller is because there is a corresponding "P" code in the Transmission Controller which is telling the Engine Controller to turn the "check engine" light on.
Get the codes read... Do not play the guessing game.