Have you checked your power steering fluid?
I just recently replaced the upper control arms, lower ball jts, tie-rods, drag link, stab' link, shocks, sway bar bushings, brakes, and dampner. ...basically pretty much every wear item.... and I can't think of anything under there mechanically that would cause this provided a visual inspection shows that all is well.
Is there any "clunk" when driving?
Joel P. Davis