On my 2014 S.F. i kept it simple & drained ATF Cold thru the bottom drain bolt into a measured container & cleaned the ferrous metal muck attached on the end of the magnet. what comes out is exactly the amount of new fluid that goes in. I personally think it's a better way of draining ATF then what others do on here. that plastic cap on the side of the pan is not the greatest design if You ask me.? because the cap turns to a pre-set point to tighten then stops after that. it wont turn anymore after that from there on... so I leave it alone for fear of any seapage leak.