steering problem

I have a 1984 CJ7 with a real steering problem, while driving slow the jeep will turn. The steering wheel is not moving but the front wheels are. I replace the tie rods with no luck, same problem. Took it to Goodyear, they did an alignment but could not find the problem. Goodyear said it might be in the steering gear box but did not know for sure. It has got so bad I can't drive it. Has anyone had this type of problem with the CJ7. Thanks for any help you can give.
John

your ball joints need to be replaced