Rhett, After reading my post, it does sound like there is no hope of fixing this problem. Which is not nessassarly the case. What I was trying to say was I've read every post on this sight and have tried every suggestion and then some, to remedy this 65-70 mph vibration, with no conclution. Also almost every thread posted on this issue never came to a consistant root cause of the failure, that is if the thread even ended in a conclution. Agood example is right in this thread. Darkman has experianced this problem, and has tryed several different solutions,but never stated if the vibration is gone. Nothing against darkman he did the same thing most other people with this problem do (including myself), we see the post and say hay I have this problem to, I never did find a solution, I think I'll let this guy know what I tried (and thats where it ends. No solution)In responce to the 99% of the 65-70 mph vibration. That is simply not true. Most of the poeple that posted a vibration at 65-70 mph noticed it or still have the vibration after they replaced the radious arm bushings. Please re-read the original persons post (Redwinggirl99). I could be wrong but I'm under the impression the the radious arm bushing have already been replaced. But then again she could be refering to the camber bushings, when she states bushings. Like I said in my last post I found a shop that sounds like they really know what there talking about, that said that its possiable that the rear driveshaft may be the culperet. But they have a high confidence level that the problem is in the wheel assembly(mainly ballancing). This is there hypothosys: If the tire is dynamically ballanced, the Std. shop calls that good enough. But if the rim or tire is out of round usually the dynamic ballancer won't even notice it. The first harmoncs noticed form a ballanced tire is 57 mph. On some tire depending on size that speed is differant. this out of round tire at speedes of 65 mph cause vibration. If your radious arm bushings are woreout thats the first place that you are going to see the problem. If you fix the radious arm bushings, like I did, then they are saying that I only fixed one of the symptom of the root cause, but sometimes thats enough to absorb the vibration. In other cases the wheel assembly needs a specialty shop to do a more indepth examination. like the one I'm gonna try next week. One thing the shop added is that a vibration at the lower speedes (35-45 mph) are usually driveline related (u-joints, ball joints, tierod ends, or a slung wheel weight). I hope this clears up what I was trying to say.