Helping a friend out with a CJ8.. Problem is this- steering to the right you have good power steering. Steer back to the left and once you get past center there is no power steering. Steering by armstrong, so they used to say. He has already changed the steering box out for another one, and the problem is still there. Don't see any linkage binding anywhere. Steers fine with front end jacked up, put it on the ground and here's the problem again. Any ideas?