Why is my Ford S-Max's transmission making a whining noise?

I've had myFord S-Max for a couple of years now and recently I've noticed a high-pitched whining noise coming from the transmission. What could be causing this and how should I address it?

The whining noise could be a sign of low transmission fluid or a transmission fluid leak. Check your fluid level and inspect for any leaks. Have a mechanic inspect the transmission if necessary.

I had the same issue with my Ford S-Max and it turned out to be a faulty transmission pump. I had to get it replaced to fix the noise. It's best to have a qualified mechanic diagnose and fix the issue for you.