I just got finished rebuilding my front DS. I didn't think this would actually cure my vibs, but it needed done and I figured it wouldn't hurt. Anyways...
2005 Rubicon, auto, 32s, 5.13s. Last year I had my Jeep regeared to 5.13s and after the break in I was able to drive that thing around at freeway speeds smooth as silk. A few months later, I redid the rear and added Savvy arms with a Currie track bar. Still no issues. It's when I added the Savvy arms to the front of the Jeep that the vibs appeared. It was smooth up to 55 and that's when I could start to feel the resonance coming on and get gradually worse. I have played with pinion angles, DS orientation etc. When the front shaft is removed, the vibs go away. Axle is centered and squared.
I did my Savvy UA in September and have left the front DS out most of the time. I put it back in tonight and took it for a spin and sure enough, the exact same characteristics as before were present. Jeep is smooth up to 55MPH and from there the vibs get gradually worse. I don't think the tuck had any effect what the actual issue is.
I am at a loss on how to diagnose this, and hope there are answers. My only thought was maybe (I SAID MAYBE) the eight bushings in the original control arms were enough to act as a damper between the axle and the frame. Typically the issues come after a regear or tuck. In this case, I don't know.
2005 Rubicon, auto, 32s, 5.13s. Last year I had my Jeep regeared to 5.13s and after the break in I was able to drive that thing around at freeway speeds smooth as silk. A few months later, I redid the rear and added Savvy arms with a Currie track bar. Still no issues. It's when I added the Savvy arms to the front of the Jeep that the vibs appeared. It was smooth up to 55 and that's when I could start to feel the resonance coming on and get gradually worse. I have played with pinion angles, DS orientation etc. When the front shaft is removed, the vibs go away. Axle is centered and squared.
I did my Savvy UA in September and have left the front DS out most of the time. I put it back in tonight and took it for a spin and sure enough, the exact same characteristics as before were present. Jeep is smooth up to 55MPH and from there the vibs get gradually worse. I don't think the tuck had any effect what the actual issue is.
I am at a loss on how to diagnose this, and hope there are answers. My only thought was maybe (I SAID MAYBE) the eight bushings in the original control arms were enough to act as a damper between the axle and the frame. Typically the issues come after a regear or tuck. In this case, I don't know.