Yeah you guys know everything. Not like an engine oil flush, when I say "flush" I mean take it to a shop. DIY only gets between 50 to 80 percent of the old fluid out. But if you take it to a shop they have a machine that flushes about 90 percent of it out. And that is what it's called, a flush is how the shop changes automatic transmission fluid. But you wise cracks know everything, especially since most of you are running the same burnt fluid that was in the vehicle the day you bought it. And the last time the automatic transmission in your vehicles has had a fluid and filter change is probably about as long ago as most people's which equals never... And it's probably severely burnt and only a matter of time ... When I buy cars, trucks... One of the checks I perform is the fluid. 9 out of 10 that I check are running burnt transmission fluid. That means it has not been changed in well past 20 thousand miles. I am certain most people run 50 to 100 thousand miles and never once change the automatic transmission fluid and filter. And yes, unless you do it yourself it is called flushing the fluid and changing the filter.