Steering box adjustment is limited to steering arm shaft end play. On the opposite end to the steering arm you will see an adjuster locked by a nut. This should be done carefully by disconnecting drag link from steering arm cracking nut and screwing in adjuster until end float is eliminated with no bind over full travel after nut is retightened. Do not do this with drag link conncted as bind will not be as apparant. There must be NO bind at all.