I just bought a new 2018 Transit 250, 148" wheelbase, high roof and I am hearing a whining/whirring/whistling noise coming from the rear whenever I get above 60mph. The noise seems to also pick up in strength if you hit the gas harder (again, over the 60mph threshold). This van is brand new (200 miles at this point), so I'm wondering if anyone else has experienced this. I have the 3.7L Ti-VCT V6 Engine, and NOT the turbo, so it's not a turbo spooling. Any help is much appreciated.

 

What does the dealer service center say?

 

I think all of the Transits are making that noise. It is described as whine, vibration, and rumple strip noise. Ford has been working on the problem sense 2015. Mine has a new Driveshaft but still makes a noise like running on the rumple strips on the sides of the road. It comes and goes and is always between 55 and 65 MPH.