fresh 904 rebuild, not shifting at all

mopar0166 said
Ill look more into a problem with the regulator circuit of the valve body, and readjust the rear band. if the band was to tight not allowing the shaft to be spun by hand would that lead to low pessure in the trans ?

The band adjustment has nothing to do with oil pressure.

BTW: is your rear band the double wrap or single band? If it's the double wrap it's needs backed off a bunch more than a single wrap band.