I'm not a mechanic but this advise was provided by one and you use this advise at your own risk.
This is how I was told to do it by a very large independent service center.
Go to the bottom of the radiator and feel the hoses. You want the hottest one at normal operating temps. This is the one coming from the transmission. It is not a big deal if you get the wrong hose it will still work. Take the hose loose at the radiator and put the hose in a container large enough to hold all the transmissions fluid. Set the emergency brake and place the transmission in neutral. Start the vehicle and let it idle. When the oil quits coming out of the hose shut the car off. Now you can drop the pan and change the filter without making a mess. You will also have removed most of the oil.
Do not leave the vehicle running after the oil quits coming out of the hose. It will take a little while but you will damage the transmission if you continue to run it without oil.
I've done this on my vehicles several times with excellent result. Really nice not to have oil running down your arms when dropping the pan.
Edited by Cvans, August 31, 2016 - 10:47 PM.