I figured that changing the transmission fluid was just normal maintenance once a vehicle got some miles on it. We changed the fluid on the wife's GMC Acadia and a couple days later I was listening to one of those car service gurus on the radio about changing the atf and he said that if it isn't broken, it doesn't need fixing and to leave it alone. Then a guy or two phoned in and said that their transmission started to slip shortly after they had changed out the fluid and cleaned the screen. It has been 20k more miles on the GMC since the change and no issues so far, but we are pretty easy on our cars. I was kind of surprised when a car fix it guy talked about NOT doing a $ procedure.
Cheaper to change fluid then rebuild a transmission , especially on a front wheel vehicle like an Acadia
