2004 Ford Freestar tires Move a little

To me, it sounds like transmission or no voltage to, and/or failed electronic components, controller/Sensors/switches, sungear or plugged filter, low fluid, blocked passages, torque converter or solenoids, broken or missing bolts at flex plate, etc.

But, if the engine doesn't rev like a slipping or disengaged transmission would suggest, that would really be bad.
You can have it diagnosed to determine internal/external problems. That would be my suggestion if you aren't sure what to do.