How often should I change the transmission fluid in my Vauxhall Zafira Life?

I noticed that my Zafira Life's transmission has been shifting roughly lately. How often should I change the transmission fluid to maintain the smoothness of my vehicle?

It is recommended to have your transmission fluid changed every 30,000 - 60,000 miles.

If you often drive in stop-and-go traffic, it is best to change your transmission fluid every 15,000 - 30,000 miles.

I suggest checking your owner's manual for the recommended interval for your specific model.