Ive got a 2011 Dodge Challenger with a circle D street series converter in it that I can not get to stop slipping the converter.
All TCC slip tables have been set to zero, maxed out, and everywhere in between in testing but when the converter is commanded to be locked it still tries to get 15 or more rpm of converter slip. If you give it any load it has larger swings in slip since the clutches are not really designed for any slip.