fresh 904 rebuild, not shifting at all

could the rear band be too tight ? also i was getting a pessure , there has to be an internal issue with the pump it self. Im awaiting a slide hammer to get it out.

Yeah if the rear band is too tight that'll cause it to be tight and possibly not turn at all. What are you saying about pressure? If your saying your not getting pressure that doesn't mean it has to be a pump problem. It can be the pump or more likely it's something in the regulator circuit of the valve body. It's actually really rare to have a pump problem unless the converter wasn't seated in when it was put it together and was forced together shearing off the pump lugs.