How often does the transmission fluid need to be changed in a Ford Focus?

I just bought a used Ford Focus and I'm not sure when I should change the transmission fluid. I've heard varying opinions from mechanics and other owners about the frequency of this maintenance. Can anyone offer some expert advice on when and how often the transmission fluid should be changed?

It's recommended to change the transmission fluid every 30,000 to 60,000 miles. However, it's always best to refer to your owner's manual for the specific maintenance schedule for your Ford Focus.

If you drive in heavy traffic or do a lot of stop-and-go driving, it's a good idea to change the transmission fluid more frequently, around every 30,000 miles.