The most dominant technology for today's automotive applications is the Rack & Pinion Steering system, commonly known as power steering. TRW Automotive is among the world's leading suppliers of Rack & Pinion steering systems.

The conventional power Rack & Pinion Steering gear assembly is composed of 45 or more individual components. Major components of each gear include the rack, the pinion, a valve assembly, a rack tube housing, a pinion housing, a yoke plug, flexible bellows and pressure lines.