No codes? I would return it to the tranny shop. Also the gov pressure solenoid and sensor will cause a no shift issue and or missing gears if they are bad. Mine did not throw a code for about a month and I thought my trans was taking a dump. Replaced them and not had a problem since. There are Borg Warner gov pressure sensors and solenoids that the dodge guys are using on their 5.9's with the 46RE. It's supposed to have a larger capacity and able to handle higher line pressure/ more fluid. I got the Mopar units since I hadn't heard about the BW.