I need help with this tranny. Problem is i bought a new radiator.....turns out it was broken inside and my tranny fluid mixed with the antifreeze so i got antifreeze in the tranny. I flushed it with about 8 gallons of fresh fluid until it was red again but my problem is this:

How much fluid does it take?

What is the correct way to check the fluid...car running in park or hot and turned off?

I appreciate any help.

Thanks