Ask Honest John

Most recently answered automatic transmission fluid questions
I have a Ford Mondeo automatic. I intend to keep the car until one of us pegs out. Should I be looking to change the gearbox oil? If so at what mileage?
My BMW 328i has done 66,000 miles and as it’s now 10 years old I wonder whether I should arrange for the automatic gearbox to have an oil/filter change?