Steering
There is a lot going on in a steering system.
Steering wheel, steering column & mounts, steering couplers, steering shafts, gear box or rack & pinion, power steering pump, idler arm, center link, tie rod ends.
And it’s not always a straight line from the steering column to the gearbox or rack. Often times the steering shaft needs to be modified with an idler bearing and additional coupler, to make it around a header or other protrusion.
Everything needs to work together flawlessly for smooth and safe system.