Oh I checked the fluid all right .....I was on the dipstick..LOL.. That's why I told the story. As doing nothing isn't probably the best choice. I did luck out on the 1990 Camry though as a guy just had his transmission redone and was side swiped real bad on a 1991 Camry. So i just swapped the engine and transmission and got several more years on it before it rotted in half.. It was the car I took my drivers test on.

I agree that a 30k spill and fill would keep the lubricating properties there and
cleaning the magnets and screen filter would keep the fluid pressure up. So in 3 to 5 changes most of the old fluid would be gone. :-)

That's probably how I would do any auto transmission when you don't know the last time its fluid was refreshed. On mine that i know, I just exchange all the fluid out and give it new fluid and a quick clean every 100k.. If it was heavy towing, I probably drop down to 50k. But that is just me. :-)