Mack,
I think the point Keith is making is try to determine if there is any free-play in the pitman arm where it attaches to the drag link. With the coach parked and the steering wheel straight ahead, how far can you turn the steering wheel from side to side before the front wheels actually start to move. If it is excessive, next determine if the free-play is inside the steering gear box or the pitman arm to the draglink. (the pitman arm is the part coming out the side of the gear box that moves forward and back). With someone holding the pitman arm, turn the steering wheel from side to side. If the wheel moves and the pitman arm doesn't, the issue is between the worm and sector adjustment. If the pitman arm moves and the drag link doesn't then the issue is where they attach. Excessive free-play in the steering will wear anybody out in a short time and is dangerous. Good luck and I hope you discover your problem, Fred