A904 no shift into 2nd or 3rd

And again, I do not want to remove the transmission. I will if I’m forced to but I really need that to be a last resort. I just don’t have the time and Money to pull it and have it rebuilt. It just doesn’t seem like it should need completely rebuilt.
I’ve done this process in the past with great success, of course that was the past!
I really appreciate all of the suggestions and will be looking into every one.