Njelectric

I have a 2015 3500/6.0. At 27k trans acted irregular and ck engine light on. Dealer kept truck for 2 weeks, rebuilt trans. Put a recond torque converter in. Truck came back with a nasty driveline vibration. They flipped the driveshaft 180 and problem is still there. Hopefully they will try a new driveshaft next. Otherwise perhaps they bent the flex plate during the r&r?