how to change automatic transmission that is sealed

Another brilliant idea from the insane engineers who want you to take everything to the dealer. They have special equipment for pumping the new fluid up from the hole in the bottom of the pan.

Just one more of many reasons I won't be buying any new car any time soon.

Since it sounds like you drained it already go to the auto parts store there is a nipple thay will sell you and a suck shingun that will alow you to pump the fluid in to the pan.