Heavy vibrations

[dykzeulb]

I have a set of stock explorer wheels, and stock sized tires with all terrains, it never did this before, and no mud caked behind the wheels, but it seem to be vibrating bad upon acceleration, at one point I had 31"s which shook it pretty bad, however when I put stockers back on I had no issues...does anyone know of what I need to replace, or where to start looking to fix this issue? I dont know a whole lot about these vehicles, and some one mentioned a u joint..I dont even know what a u joint is, does, or where it's at, I suppose something to look into the haynes/ chilton manual about, how can I tell when that part is worn out if I do check it? Thanks for helping an idiot in distress!

 

[Anime]

If the vibration is only with the 31's and not the stockers, it's likely the tires aren't balanced correctly, or theres some kind of defect on one or more of them.

 

[dykzeulb]

The vibration wasnt there with the stockers when I first put stockers back on, however it is there now, I am running stockers on all terrains.