So that's what I'm hearing (RE clunk). I keep trying to figure out what it is, coming from the rear area. But I did replace my RE control arms about 5,000 to 8,000 miles ago with Metalcloak CA, so maybe that's not it.my old RE arms are about the same weight, maybe lighter even. the problem is my 4.5" Re's aren't as strong and more susceptible to bending. one has been hammered a number of times (passenger side) plus the new arms are double adjustable which allows you to make adjustments in place (pinion angle, four wheel alignment, and such) as for skid plates my skid plate is 3/8" thick and lighter than the factory one it replaced. steel bends easier than aluminum for the same weight. I had my RE 4.5" lift since February of 2000 and it was beat up, I've rebuilt the flex joints 5 or 6 times and replaced the clevite bushings twice. the ends on these are where the weight is, just like the Johnny Joints. If you dont already have the "RE clunk" you will eventually.