Hello,
Recently picked up a 2000 Ford Excursion V10. Tires are 35" MTs. 6" lift. I have yet to really dig into why it begins to vibrate at speed. Im hoping w this info on the widening of the speed range at which this occurs, it may shed light on the possible culprit(s). I've read where it could be anything. Have followed a thread where a guy went thru everything, bushings, tires, bearings, driveline components and was at his wits end because it still was there. I'm hoping w my update here my issue is easier to rectify. When I got it, done as is, the vibrations occurred from 59-70mph. It's not in the steering wheel fyi. More so feels like the body, console , seats. I guess all around me but not the steeringFord Excursion wheel. I'm on a 400 mile round trip. As of now, it starts at 55 and thru 78 and was still present. I didn't take it any higher. Now this harmonic sound / vibration I can hear in the tires. Pretty sure this either didn't exist or just not noticeable before. I made a video which this can be heard. I'm really wanting to lean on a tire balance would fix. Kinda checks out. Any thoughts are welcomed. Video