While replacing the rear leaf springs on my 1988 Cherokee, the welds holding the nut in the frame broke. It was in the front support and there appears to be no access to this nut. I know what the problem was, after I cut the spring and bushing away, I could see that the split collar had corroded to the bolt. This kept the bolt from comming out and ended up pushing the nut from the frame. Anybody else had this problem? What was your solution?