My truck started off by saying "Range Shift Inhibited" and throwing a P0700 code. I replaced the NSBU (Correctly) the line shows up below every letter just fine. But the truck gets stuck in 2nd gear and sometimes 3rd (It's throwing shift solenoid codes and a reverse solenoid code). Also the truck won't shift into drive after its been sitting. I've been told this is called "Torque Converter Drain Back". Anyone know how to solve these issues? Please don't tell me to check my connections or check the fluid.