What causes shaking vibration on a 2006 fleetwood fiesta motor home when i reach speed of 60 mph or higher?

Vibration at 60 mph might indicate a wheel balancing problem. Since the steering wheel doesn’t shake, only the rest of the vehicle, it is likely that at least TWO tires are out of balance. One possible explanation for this is if you recently had new tires installed and a couple weren’t balanced properly.

Another possible cause is that your tires are old. If they’ve got at least 10,000 miles on them, the rubber may be starting to separate from the inner tread. This can also be caused by driving over something sharp or running them over- or underinflated.

Additional causes to check:

- Tires are out-of-round

- Rim bent or damaged

- Driveshaft out of alignment

- Loose U-joints

- Control arm bushings/ball joints worn

- CV jointsworn