Rebuilt 904. Whirring. Dead?

That's only possible if a modified manual valve was installed. I've owned so many Mopars I can't remember and all have checked much higher on the dipstick when in park, virtually the same level as with the engine shut off. I actually did state it wrong when I said it does not pump in park because it does pump, it just doesn't fill the converter. That's why they check high in park compared to neutral.