I don't thing there should be any up down movement of steering wheel as you turn it. There will be minimal fore aft movement of the pitman arm at midway point left to right. Do you have service manual GSS1408? It is available free in the library here. Section 3 of the manual gives quite good instruction and photos of the steering gear. After you make the adjustments per the manual turn steering left and right to make sure it is free in both directions. If it binds when turn left or right you will have to loosen the straight ahead adjustment a little bit.