Transmission oil change due to time?

et2 wrote:
It most certainly is a baseline. As matter of fact there are different scenarios "based on driving habits" and operational conditions.

Throwing a bunch of stuff on the walls and hope it sticks, doesn't help me to understand what purpose it has in what's being discussed. It isn't rocket science. Personally I've always followed the owners manual fluids recommendations even after warranty expiration. Never had any issues. I venture to say they're pretty dang safe.

Payoffs, negotiations, etc, as you want us to believe doesn't make any sense in helping people make a educated decision based on the fact there is published criteria by the original manufacture that answers all those questions.

I didn't throw a bunch of stuff, just gave you a bunch of facts. The point is simple, your baseline is flawed. An engineer said how many miles, a purchasing guy said once per year. It all comes down to your last point. To make an educated decision you need facts and information. Sometimes you get them by asking.
You didn't know why people don't just follow the manufacturers manual, the answer is exactly what you said, because we want to know better, and a lot of times people in the forum has information, so I asked. So if we ask you complain, if we explain you complain.
Let me be clear. Changing fluids means risk and additional wear. It was demonstrated over and over by several companies. If the trans fluid can last 150K, I don't buy the "time" component that easy.
Do yourself a favor, no manual from ANY manufacturer is gospel. Do you need to follow it for warranty? Great. Do you want to follow it because it makes you feel good? Awesome. Just accept that some of us believe that someone may know better. Not better than the designed, just better than the petty bean counter or attorney writing the manual.