The steering box is adjustable. There is a locknut and adjusting screw on the top of the steering box. Loosen the locknut and turn the screw counterclockwise to remove the slack. I would suggest you be patient and tighten it in small intervals,the test drive it. You don't want the steering to bind on you by overtightening it. Have fun.

__________________
1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T