Why is it important to regularly change your Ford Fiesta's transmission fluid?

I've heard conflicting opinions on how often the transmission fluid in my Ford Fiesta should be changed. Some say every 30,000 miles, while others say every 100,000 miles. What is your recommendation and why?

As a Ford car mechanic, I highly recommend changing your transmission fluid every 30,000 miles. This will ensure that your transmission stays lubricated and clean, preventing any potential costly issues down the line.

While the Ford Fiesta manual may suggest changing the transmission fluid every 100,000 miles, it's always better to err on the side of caution and change it every 50,000 miles. This will prolong the life of your transmission and prevent any major issues.

In my experience as a Ford Fiesta owner, I've found that changing the transmission fluid every 30,000 miles is the safest bet for your car's longevity. It may seem like a hassle, but it's a small price to pay compared to the cost of a transmission replacement.