The issue here is trying to hold a smooth, chrome plated tie rod shaft that has no wrench flats stationary while tightening the jam nuts on either end, one right and one left hand thread. I'm still struggling with the force/motion that will result, but it seems that opposing wrenches on the jam nuts will tend to "pinch" the rod since both tie rod ends are held fixed by the bolts through the heim joints. I could also be all wet....