Hey guys. I just put on some 37 yesterday. I used to have 33 and my jeep road prefect. Now with the bigger tires I have some pretty major wobble around 60-80 kmph I don't want to go any faster to see if it gets better incase somthing goes horibly wrong. My jk has a 2" rubicon expres lift and a 1" performance accessories body lift. Any ideas why it is acting up. Oh ps they balanced the tires with bead bags.

 

i have not had luck with balanceing beads. i would make them take it out and run lead weights. if you got up to 80 you did not have death wobble. it is the tires

 

Loose suspension or steering components, bad ball joints, unbalanced tires.

 

I purchased a 2008 JK 2 door with a 3" Black Diamond Lift and vibration at 70mph. This JK had 32000 miles and the front axle was out of alignment with the back at least 1.5 inches! I move the axle by adjusting the front track bar, lessened the vibs alot. I bought adjustable lowers to move my pinion angles to something acceptable to lessen the drive-line vibs. I still had wheel vibs and that did not stop until I replaced all of the ball joints on the front-end today! They checked tight with a cheater bar but when removed...SCARY LOOSE! They may seem tight running 33's but the extra pressure of running 37's may be pushing your weakened and worn ball joints to the limit! I purchased aftermarket heavy duty joints that are greasable. I suggest you closely check your ball joints when using bigger tires and wheeling AND get the alignment checked. There are forum listing for the driveway alignment procedures until you can get to a professional shop...preferably a 4X4 alignment shop that know what they are doing! Oh yeah, I am running 35's.