I just got my car to run, had recently pulled the engine and trans. While the trans was out i removed the pan and changed the fluid and filter. When everything was back it and ready, i drove it. It engages into rev and drive quickly, but wont up shift from first gear until
4500 rpm. It does the same thing in the upper gears as well. If I put it in neutral and then back into drive, it will land in the correct gear for that speed, as if i was driving a stick shift. Any ideas? My transmission mount it bad, would that affect anything?