Trans and / or converter damaged?

Hi Guys, was at the drags this last weekend, only one bad run...something went south in the drivetrain. after burnout it felt a little rough....did not worry about it too much. When i returnd i noticed that it´s like if there´s no torque converter, engine is directly connected with the trans.....if you put it in gear engine dies - just like dumping a clutch in idle. Talked to some guys there, they told me sth. about the stator in the converter.....what do you think?

Now it´s time to upgrade....will check / rebuild the 727 too and put a Transgo Shiftkit in it.

Michael