Dakota,97,12vcummins

Ok I have a 97 dodge 12v cummins with the 47re 4 speed auto I'm have shifting issues and no overdrive it has a big delay in shifting from 1st to 2nd to 3rd and sometimes I dont have my 4th gear . The speedo does not work and od off light stays on with the trans temp light . I replace all the electrics in the 47re with filter and accumulator spring and the output speed sensor on transmission and the sensor on the transfer case . Does anyone know what this could be could it be any other sensors or pcm or could the tranny be going out