How do you know how much transmission fluid goes back in

madknuk

I tried keeping track of fluid after changing pan gaskets because they were leaking but a lot spilled on the floor...wowsers what a mess, so when you put fluid back into the filler hole is the car suppose to be running? Im forcing it in right now and it keeps running out? Drive it back and forth in driveway...check it and its low? add more...repeat... add more repeat...yikes any help would be appreciated thanks