Thanks for the welcome.
I've already got the fsm and the 6g72 manual- I used them to rebuild the engine.
I haven't gotten any codes at all from the transmission its like it wants to be elusive - if I had a code, at least I'd have a starting point.

Took her out this morning I could 35mph in 2 but only 20mph in D. At least until it warmed up - then off she went with no problems. Wondering if the AT temp sensor is functioning right.

This my very first rebuild! The most I've ever done before was replace a lower intake manifold gasket on a 98 b4000 and replaced a cv boot on a 4wd 95 blazer with abs. So this is a huge learning experience and frankly I don't know squat. I've been haunting this forum since last Sept. when I started this project and just recently joined. So thank you everyone for all your previous posts.