Steering very loose 98 f-150

Recently my steering has just gotten very loose. it takes no effort to turn the wheel. It feels like the front end of the truck is off the ground when you turn the wheel thats how easy it is to turn. My truck is a 98 f-150 off-road 4x4 XLT. Has this happened to anybody elses truck or does anybody have a suggestion?

I found and fixed the problem. For future reference it was the power steering gear box.