I spoke with a service shop about getting my transmission fluid changed (in my 2014 Kia Rio 6 speed auto). I was curious if they could get more of the fluid out than myself just dropping the drain plug on the transmission at home (which only get about 35% out).
He said that my transmission do not have cooler lines, and they they go in from the top filler hole with a tube and then run it through the gears and remove fluid using this tube.
In this methodology, is it possible to get the majority (like 90%) of the fluid out? I don't want to pay all that labour if I can get similar results from the drain plug at home.