</font><font color="blue" class="small">( Only the quick oil change ripoff artists recommend changing it at 30K mile intervals. If they could get away with it, they would recommend it every 3K miles like the engine oil change. )</font>
Wow---what a blanket statement---maybe some people here work at lube shops trying to earn a living. It would be a kinder, gentler nation not to stereotype.
Im ok if you never change it personally.
As far as vehicles go:
I make more money on auto tranny rebuilds than on tranny services, so it's in my best interest you never change the fluid, ever.
But I do in my vehicles every 30K.