[Rev]

Could be in the steering box . You can adjust the preload on the worm gear. There is a screw with a lock nut on top of the box. What I did was to loosen the lock nut, turn the adjustment screw clockwise only about an eighth turn, tighten the lock nut and then check for steering wheel play. I repeated that untill most all of the play was gone. Do it only a little at a time so as not to over do it. Try that and see if it helps. It did for me.

Rev