Determine where the looseness is. With front wheels raised (supported by floor jacks to frame on each side) have a pal gently rock steering wheel back and forth from 11 o'clock to 1 o'clock while you check for play in each joint in the steering mechanism. Check the lower ball joints by putting a pry bar under each tire and lifting up. Play in steering box can be reduced by turning set screw adjustment CCW. Go easy.