I don't know if it is so much that (drivetrain alignment). IMHO, Having the drivetrain out of alignment would cause them once you got up to speed. My `96 does it at idle, but it comes back to the way the engine is running (poorly). It has some new spark plug wires coming for it (misfire problem) but right now the idle is slightly erratic.
I'll bookmark this thread and reply after the new wires go on.
Only at idle, in gear worse then out of gear, the more accessories that are on the worse it is. Right? That's what mine does.
