What About Flushing ATF? Found Answer!
 

Is it it possible to flush the system by pulling one line from the cooler, placing thesupplyline in fresh fluid and the return in an empty bucket, crank the truck and let the pump do the work?
My concern is that while I know it will pump the fluid out, I'm not sure that it will pick up the fresh fluid and pull it in.
Iwas referred here.
http://www.ford-trucks.com/article/idx/9/057/article

transmishon 2004 f150 4.6
 

how is it don on a 2004 f150 and how do you ge the line off and do mercon lv is it compadable with mercon v if not now much dange will it do o he trany