Ok guys, heres the problem. I had a wreck and was hit hard on the left front tire. The front housing on my 08 Rubicon was replaced because the front shock mount was bent. The body shop also replaced just about everything else under the front end except tires, knuckles axles and driveline. I pulled the front driveline and the vibration is still there. 4wd parts in Marietta Ga. supposably checked everything out including alignment. The jeep also darts more than it use to. I am going to take it to Xtreme 4wd next week and let them fix the problem but was just wandering where you guys think the problem may lay.