Hi I think that I may have steering gearbox problem because from one day to another
I have all lot of play on steering wheel could the steering gearbox be the problem

 

Yeah, it could be.. or it could be tie rod ends or a drag link ends , loose pitman arm , ball joints or even wheel bearings.. a rag joint is a good culprit for that too, need to check it out and see whats loose..

 

If you have access to a jack and some stands then lift the front end off the ground. Grab the wheel horizontally and try to wiggle it back and forth (basically simulate steering), if it seems pretty loose then your tie rod ends might be shot. Then grab the wheel vertically and try to move it back and forth, if its loose in this plane then your ball joints might need replacing. This isn't the most accurate diagnosis but it is a start.

 

Best start is to have someone move the steering wheel back and forth with it on the ground while you look at all the steering pieces and see whats loose, if you can't see everything when its up and well supported try wiggling everything and even use a bar to pry up and down on things to see if they move.. anything that moves independently from what its attached to needs to be replaced

 

You need to state what vehicle you are talking about. It's hard to help if we have no idea what the vehicle is. Twete77 is right. The best way to check, especially if you don't have help, is to get the front end off of the ground with jackstands and just start shaking the tires. If something is loose you will see it.