Great detailed post @RaymondT. II dug up this discussion on a skid made by a company called TKD from @Chris' build thread. Hope you guys recall the discussion. I've somewhat convinced myself the either the skid or the damper or both may need to be changed to curb these post regear harmonic vibrations. We've been talking a lot about the damper, but the TKD skid is actually quite promising not only from clearence viewpoint, but also from vibration standpoint since the design is actually different and well thought out.
$400+shipping is not too bad either. Thoughts on trying a skid like this in the vibration context? Worse case I'll have a nicer skid.
https://wranglertjforum.com/threads...oring-and-family-fun.8537/page-20#post-137666
Are there less problems on the skids with crossmembers?