so a few months ago I got a new transmission because my first one blew up and few weeks later I was driving my ss on the highway and suddenly it started to shift funny. I take it home and run it through a computer, I got 2 codes (P0700) and (U0073) after that I haven’t touched it since. I also have no Idea what it could be. everyone I take it to isn’t serious or I just don’t trust them.think y’all can help? much appreciate it if so.