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.

One more, I personally know the guy who designed the V10 and trans for the Ford motorhomes. He told me what to do, and it was not what the manual said. I have a rental fleet, and I have sold rentals with over 300K miles and they didn't even consumed oil. My car, a nice 2000 Lincoln Town Car Cartier L, has over 520K and runs like a champ. all originals powertrain. I would not trade it for anything.
All that because I asked, that is why some people just don't simply follow the manufacturers manual, they also ask, like I did.