I used a hand operated pump that I got from Autozone or someplace like that. It had a hose small enough that fit down inside the transmission dipstick tube. Much easier than taking the pan off and only takes a couple of minutes.
I'm too broke now. I'm doing it the old fashined way, take out the dipstick and wipe it a couple of hundred times.
I took out about 8 ounces, size of a regular drinking cup. I can't take it down to oem levels because I have a aftermarket oil cooler. I drove for 40 miles the gauge didn't move much. We'll see how the next take will be. This one is ruined for sure since I did a lot of 4K idling.
Well, here is what I learned from a well written book ?Complete Car Care Manual? published by Reader?s Digest (1981, page 202). ?You may accidentally overfill it and cause as much damage as you would by operating the car with too little fluid? with regard to overfill of automatic transmission fluid according to the book.