I just installed my Teraflex budget boost with shock adaptors on my 09 jku sahara auto. I have a constant vibration on the floor and felt on the steering wheel. I am not sure if this is expected given that I just put on new 33" mt's as well. I have never had an mt tire before and I expected that I would feel a difference. I guess my question is, is this vibration most likely the result of the aggressive tires or could this be a driveshaft vibration? When slowing down or accelerating from a stop I can notice the tires gripping and vibrating slightly and it seems to go away when driving around town at lower speeds, when I get upto 80-120km/h I get a slight vibration.
Any thoughts?
Thanks

 

What was the actual raised height of the BB? Did you do a full measure before and after? it could be a track-bar issue. Lots of possibilities here. Also, where do you buy your tires and rims from?

 

I have an 07 X and also put a 2.5" BB and new Taraflex shocks. I did not have any vibrations after the lift install. I have 285/70/17 KMT Mud T/A's. You can feel the tires vibrate a little at very low speeds. I do not have any vibrations other than that. Did you do the install the lift yourself? I am going to BFG's alterain T/A's when these mud's wear out just for a little smother ride.

 

The actual lift gave me 2.75", I did install the rear trackbar bracket that came with my kit. The tires and wheels are brand new and they balanced good when installed. I am thinking about putting the factory tires/ wheels on just to see if it is my tires causing the vibration or if I have other issues. I have also noticed that both axles have shifted to the drivers side maybe a 1/2". I haven't measured but I tried to eyeball it.

 

You can drop a plumb bob from the middle of the jeep to get a true "center". Yes, a centered front and non-centered rear, centered rear and non-centered front, or dual off centered axles can cause you problems. Honestly though, with that amount of lift, it should be negligible, even if you believe that your axles are uniformly off center. Maybe you have rocks in your tires...

 

No i haven't, i had everything torqued when the tires were off the ground. Should i loosen everything off then re-torque with the tires on the ground?

 

yes! rubber bushings get bound up if they are not tightned at ride height.

 

Thanks for the help, i will try this and hopefully that will resolve the vibration issues!

 

Did you ever fix the vibration issue? I'm having an issue very similar to yours and I'm going nuts trying to explain it/ fix it!

 

Are you driving real close to the edge of the interstate???


and slow down...why are you doing 80 in a jeep

seriously.... I have 35MTZ's and they are smooth as can be