Backlash in the steering gear. Steering gear play can roughly be detected by looking at the steering arm, when the assistant turns the steering wheel back and forth (the vehicle is on the ground). If, after changing the direction of rotation, it is necessary to make a large movement of the steering wheel until the steering arm moves, the steering gear is most likely worn, or requires adjustment, according to the factory instructions. In the Polski Fiat 125P, the play between the worm and the roller is adjusted with the adjusting screw located at the top of the steering gear housing.. The worm bearing play is adjusted by removing one or more shims, located between the housing and the thrust bearing cap.