Wow, that's annoying. LOL It honestly sounds like something is vibrating. Have you tried having a helper ride in the rear to get a specific area or location where it's coming from?
I have dealt with things like this where the right vibration from the vehicle has created sounds like this. Honestly, there really isn't anything electrical that would be affected by that speed.
Let me know if you have had anyone try to get a general location as to where the sound originates.
Wednesday, June 3rd, 2020 AT 7:56 PM