How often should I change the transmission fluid in a Ford Transit Custom?

I've been hearing mixed opinions about changing the transmission fluid in my Ford Transit Custom. Some say every 30,000 miles, others say every 60,000 miles. What is the recommended interval for changing the transmission fluid and why?

It is recommended to change the transmission fluid in your Ford Transit Custom every 30,000 miles. This ensures proper lubrication and prevents damage to the transmission.

I would advise changing the transmission fluid every 60,000 miles, as recommended by Ford. This helps maintain the warranty and ensures the proper functioning of the transmission.