Does Transmission fluid need to be changed?

I would change it but no flush.

My philosophy is it shouldn't be changed if it's not leaking or the transmission is working fine. If it works, don't fix it! On older higher mileage vehicles the dirt and junk in the transmission fluid can actually help worn parts continue to work. If you replace the fluid and remove the junk the worn parts in the transmission have nothing to grab onto so your transmission starts to not work correctly and may stop working all together. I agree with the Dealer on this one. Leave it alone! Hope that helps! Jim

I normal would say to change it, but the Focus has had issues with the transmissions in that model year and you never changed the fluid. So I would also say Leave it.

Change it, but don't flush it would be my official recommendation.