When transmission is shifted into gear the car will not Move

This was a pretty common issue on these transmissions. The transmission pump fails and does not supply the needed pressure for the transmission to shift into gear properly. This is why you don't have any movement in driver or reverse.

I attached the process on how to overhaul the pump and then how to adjust the line pressure.

We need to start with confirming this by performing the pressure check. Clearly this is going to require a pressure gauge and removal of the oil pan. It is not a simple procedure but will confirm what we are seeing.

I attached the info. Please review it and let me know what you find and what questions we have.