steering wheel shaft

The gearbox adjustment is not for play in the steering wheel. This is a common misconception. It is for the movement of the gearbox output shaft due to worn bearings. You can only adjust so far until you either need to replace or rebuild your gearbox. Inspect everything first. This requires someone to rock the wheel back and forth while another person inspects everything for loose play. Inspect everything from the steering wheel to both front wheels.