96chevyz71

1996 Chevy Silverado 5.7 4l60e 4wd, driving fine and then one day the tach and Speedo quit working and shift indicator light, trans would only let me shift it manually, so I read forums and replaced the inside trans wiring harness and my gauges work now and my indicator light works, trans works fine but won’t shift out of first gear, park neutral and reverse work fine, I’ve replace ignition harness, first and second shift solenoid as well as the manifold pressure switch, my abs and brake light is on and all fuses are good, should I replace the abs sensor or vehicle speed sensor, just don’t understand why it won’t shift out of first gear anymore, any help would be great, just haven’t found any problems exactly like mine