I have a 2020 Nexus Viper 27V on 2019 Ford E450 chassis. There is a vibration noise coming from underneath the chassis, it is not in the engine. The vibration noise is only heard between 60 and 65 MPH. Below 60 and above 65 no vibration noise. Any su...
Thank you to all the great comments and suggestions. Finding a Ford dealer that has a lift in their shop large enough for an RV is difficult. I finally found one, almost 100 miles from where I live and have made an appointment.
