Finished my inspection of the truck and didn't find anything loose. Jacked it up and did the checks for wheel bearings up front, put a hand on everything looking for play and didn't find anything excessive I don't think. Did find one of the front sway bar bushings a mangled mess. Don't know if this is enough to cause the jitters. As with most of the bolts I've worked on they had been holding tight for 13yrs so didn't want to come quietly. Fought with it for a while before resolving to praying it down with PB to soak overnight, will try again tomorrow.