Just bought a 2000 Durango 5.9. Worked great the first week. Started where it didnt want to go into gear. Went ahead and did an oil change, transmission filter/fluid, plugs, wires, pcv, and speed sensors. Is running smoother now. Goes into 1st, 2nd and then when you try to get it into 3rd it goes into neutral. When you pretend you are at a drag strip it will shift. Also replaced the throttle position sensor and that made it idle hugger. Any suggestions on what to do?:thk: