I just replaced my trans with a used on, drained out the fluids, changed the filters, and now I am getting the same symptoms as this thread:

https://dodgeforum.com/forum/2nd-gen...d-changed.html

The engine is revving and the trans isn't moving. I am guessing I have an air pocket in the spin on filter. My question, is it possible to push fluid backwards through the trans lines instead of dropping the whole pan again?