It's probably just a really worn out bushing in the control arm combined with saggy torsion bars that needed the adjuster turned up to far which is digging into the frame. Time to pull it apart and throw some new parts under it.
all bushings, ball joints - and also the idler and pitman arm are new. I replaced them last year.
My suggestion is that the adjuster (the "finger" of the lower control arm) is not in the right position. It is standing to close to the frame. I think I have to pull the torsion bar out, set the adjuster down (maybe one tooth is enough) and then push the torsion bar back in.
