'course, it could also be as simple as a loose wheel, a loose wheel bearing, a broken or on the way CV joint, or diff, or worn bushes all over the place, any number of things, poor injector or injectors, bad timing, harmonic damper fell off, chimps jumping about in the back, unevenly worn tyres, incorrect pressures in tyres, unbalanced wheels, different wheels, broken fan blade, almost any number of things and they could be anywhere on the vehicle.
So in the hours between your first post and second, have you checked and ruled anything out?