Steering/FWD wheel problems?

My sons 1987 Justy Turbo not sure of exact mileage for the engine has been changed but I'm guessing 160,000? He started having steering problems with what felt like the tire was about to fall off, he would have to hold tight of the steering wheel. He had it inspected but nothing was found wrong! Two weeks later the problems got worse and made a loud noise and then would hardly move. When he tries to drive the passenger tire doesn't move but you can see the center bearing or? The center of the wheel is turning. You can however put it in 4WD and the car will go. Is this a cvc joint or bearing or? I am so thankful of all the help you guys give :wink:. Thanks, rivvy