Assuming you have a MM chassis, the steering box adjustment between the frame and the box. A thin open end wrench is required to loosen and hold the nut while turning the adjustment screw with a straight-blade screwdriver held sideways. Then the adjustment screw must be held in position while tightening the clamp-nut.
Take care not to over-tighten the adjustment screw, otherwise gears may bind and/or break. (I think mine safely tightened ½-turn.
The gears wear more where most of the movement occurs, which is from driving straight to driving a curvy road. Then when you make a sharp turn or turn to lock/maximum angle, the less-worn gear area binds.
2000 Winnebago Ultimate Freedom USQ40JD,
ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy