:doh0715:Actually quite a few parts of your suspension and drive train can cause this. so what have you checked so far? how was alignment checked. Dont' search @#$% that isn't relavent. First figure out what you know then search and ask. I am pretty sure that's why people join forums is to ask questions and chat about specific subjects.
Why does it burn when I pee?:doh0715:
Searching for the term vibrations when I first became a member of this site is what led me to learn how to check my driveshaft's balance and replace the u-joints.
Yeah, people join forums to ask questions... the thing is, Broncos don't change anymore, because they aren't made anymore. Maybe 1 in 500,000 bronco owners will ever have a problem that hasn't already been covered here.