I'd like to disspell a rumor

[ChaoticBastard]

That is NOT TRUE!!!! Do change your fluid and filter every 30,000 miles or more even if it has never been done. Just don't have the transmission FLUSHED with high milage. The flushing is what breaks free worn parts. When you change your fluid you only get about 3-5 quarts out depending on how long it takes you and how you do it, its just like draining oil.

I agree 100% I never had a problem just doing a drain and fill/filter change. Not doing it is like not changing your oil. I am flushing mine soon,91k on it and replacing the fluid with Royal Purple V.. I have heard nothing but great things about that stuff