The steering linkage consists of the following components:
When you turn the steering wheel, the steering gear rotates the pitman
arm which forces the relay rod to one side. The tie rods connect to the relay
  rod with the ball studs. The tie rods transfer the steering force to the
 wheels.   Use the tie rods in toe adjustments. The tie rods are adjustable.
  The pitman  arm support the relay rod. The idler arm pivots on a support
  attached  to the frame rail and the ball stud attaches to the relay rod.
The 2 tie rod are threaded into the tube and secured with jam nuts.
Right and left hand threads are used in order to permit the adjustment of
 toe.