I got the code in the title driving around today. Transmission feels fine, car still drives like normal. It didn't throw me into limp mode. I tried to clear the code, but it won't go away.
I'm not sure what to check. It looks like a special scanner that can talk to the Transmission system is needed to find out what the transmission specific code is, 'cause this P0700 just looks like a generic code. I really can't afford this right now. Even though the car seems to be driving just fine, I think I'm going to just park it and drive my truck until I can figure something out.