The new blue torch wd 40 is way better than their old stuff. Watched it work it's way uphill on the threads of a rusty bolt. Have some PB blaster too and may need to try it. After soaking overnight still could not break loose with impact. Forgot today was christmas with my sister so not much done today. Got driver side leaf in but will have to drop it to put shims in when we know how much shim we need.