A904 has reverse no foward

Well, I had the trans done when I swapped out the slant 6, so last summer I drove the car and was fighting a different issue, so this is a new issue, I was driving to work when I got it to about 50mph, then it quit going, from that point I had to stop the car wait about a minute, then restart and drive about 1/4 mile, then it would quit moving, rinse and repeat till I got home, after that is when I pulled the trans out etc. come to think of it, would there be a difference if I swapped out the VB from my slant 6 a904?

If it worked and then quit, something wore or broke. The valve body may or may not be an issue, or contributing.

The forward clutch is engaged in all forward gears, if you suddenly lost forward gears and then it came back when cool, I would suspect clutches and steels or a lip seal. A pressure test should reveal a lip seal issue.

You said clutches looked good, how so? Was there still grooving visible on the faces? Or were they perfectly smooth? What was the pack clearance?