2G Need another idea 99 gst auto trans problem

[AntmanAndLittleDi]

Been fighting this transmission for roughly 6 months. Transmission has been gone through three times and valve body four times, they're both good, all seals present. Still no reverse plus a couple other symptoms. Just installed a new tcu. Here's the link to the full thread, feel free to throw different ideas at me to try.
http://www.dsmtuners.com/threads/1999-eclipse-gst-turbo-auto-trans-issue.502741/