2002 Saturn SC2 shifting problem

Do you stillhave the same codes since you replaced the valve body?A used valve body wasnt a good a idea you dont know the condition of the valve body. Its pretty common that the pressure regulator bore in the valve bodies wear out and cause too low of pressure or too high of pressure. Before any repair was done you should have bought a transmission pressure tester kit and performed a transmission line pressure test.I have worked for saturn for over 16yrs and iam a factory trained saturn tech and still would have performed a pressure test. Theres a couple of other things that go on besides the valve body. The input shaft nut loosens up that will cause no reverse when it gets hot. Also there is issues with the wires to the valve body. Then a loose connection to the terminal for the main power feed at the 68 way connector on the inside fuse box that feeds power to the transmission actuators. Also the line pressure actuator goes bad and the actuator buss plate fails or leaks fluid. Those are some of the common issues those transmissions have.

First of all the 1993-2002 valve bodies are the same single or dual cam engines. The transmissions themselves are different internals as far as gear ratios. As far as measuring the transmission line pressure thats done thru the transmission temperature sensor hole. So what codes do you have in the computer now?

If you have no reverse I would say there is pressure loss somewhere possibly a loose input shaft nut. If we did a pressure test we could try looking into that. Also I have seen open terminals on the 68way connector of the inside fuse box.