I know I'm going to catch a bunch of smart a** remarks but every other trans service for me I have the Jeep dealer flush it. I get all the old out well, we all know how it works. Just something I've always done and yes I know Chrysler doesn't recommend it I've read all the posts. All my vehicles last a long time and are in great working order when sold or traded in so pretty much if the system I use aint broke I'm leaving it alone ahahahahha let the flaming begin!