What is the best way to maintain and extend the life of my Ford Galaxy's transmission?

I recently purchased a used Ford Galaxy and I want to make sure that the transmission stays in good condition for as long as possible. What are some tips and tricks for maintaining and extending the life of my car's transmission? Should I flush the transmission fluid regularly or invest in additives? Any other advice or insights would be greatly appreciated. Thank you.

As a mechanic with 10 years of experience, I highly recommend flushing your transmission fluid every 30,000 miles or every 2 years.

Adding a transmission fluid additive can help reduce wear and tear on your transmission and improve its overall performance.

Regularly checking and replacing your transmission filter can also help extend the life of your transmission.