Can someone please help I have tried and tried to eliminate every possibility and this is where I stand...I have a 2010 JKU Sport 4" procomp stage II short arm lift kit. 35x12.5 17 with some motometal wheels. I had BFG MT's and was getting this vibration more like bouncing feeling at exactly 55mph and up feels like its coming from right rear. I swapped out the shocks for some Bilsteins still there I switched the tires to some Grabbers still there I loosened tightened greased and checked every last thing...STILL THERE. It feels like a bouncing not a wobble not a vibration I wonder if its coming from my wheel I know its not the tires because it does it with the new ones on too. I look out the door and the drivers front and rear seam like the riding smooth and when I look in the side view at the rear it looks like its bouncing more than either of the others. I know I may be answering my question but is there anything else that would cause this? Bent lugs? I know its not the rotors because I don't get any sort of feeling when I brake its only there at 55mph and above. I know its not driveline because if you pop it into neutral while at speed its still there. PLEASE HELP any suggestions...sorry for the long story!

 

I'll give it a try, my question to that is wouldn't I feel that throughout the speed range? It doesn't start here and there its instantly at 55mph and up.

 

Removed the clips and am running right at 30 psi I haven't swapped wheels yet but don't have anyone to swap with so that may be my next purchase.

 

Oh it's also an automatic should I just put it in drive and do what you said how fast should I run it?

 

Have you ever seen Ferris Bueller's Day Off? Be careful running your Jeep on jackstands.

 

That's exactly what I was picturing!

 

Shakedown complete and still another misdiagnosis.

 

i just turn 4k on my 2012 jeep wrangler sport. I have 2 inch coil spacer lift on it. i just put it thru just a bit of mud, honestly just 1 mud hole and it wasnt enought to get the jeep muddy. On the way home i noticed a vabration in the front end that gets worst the faster u go. i checked the tires and there is no mud on the inside to throw any balance off. Does anyone have any idea of what could be wrong?