Double Hooke’s joint steering column (constant velocity) - In previous years, our steering column contained a single Hooke’s (universal) joint, resulting in a non-constant rotational velocity relationship between the steering wheel and the pinion that moves the steering rack. (The latter activates the steering rods.) In this new car, however, a double Hooke’s joint is implemented. One joint neutralizes the non-linearity of the other, hence resulting in an overall constant velocity system.