I just bought a 1993 with 193k miles and it has a few problems that I need to solve. When I got it park, reverse, 2nd and drive didn't work. I followed the TSRM and got park to work and can manually shift through the gears with the solenoids unhooked. But it still has no reverse. I did the throttle cable as well. I'm pulling the engine for a rebuild as it smokes and has a rod knock. While the engine is out should I just replace the trans? Or is there something I'm missing? All the lights light up on the dash and the NSS appears to be functional. My next step is to drop the pan and change the filter and replace all the fluid. What else could it be? I searched everywhere.