WTB 3500 cummins std trans flat bed

From : Annonymous

Q: lots of things can cause vibrations. of course tire/wheel balancing is the most common. what about drum/disc out of balance drive shaft flywheel or harmonic balancer bad u-joints and many other things. gary wrote well the dealer replaced my engine short block 4.7l and i still have a vibration. i still think it is in the suspension. seems to accentuate or even reverberate from the existing road surface. took my 2004 expedition over the same road and could feel a similar but less pronounced vibration in that vehicle. is there anyone that knows if this is to be expected from a 2003 could it be something in the suspension i dont want to go back to the dealer if this is just one of those things. on the otherhand it is annoying if it can or should be fixed. gary .