Hadley's SmartValve saves drivers time and effort, helps reduce injuries and landing gear damage and can improve fuel economy. Most electronic height control systems have required several separate components: the valve manifold itself, an external sensor and the associated electronics. The component fits within the same envelope as a mechanical height control valve. By conveniently raising the tractor frame over ride height, drivers can reduce the time and effort required in coupling with trailers found at many different ride heights. There eliminates the need to crank the landing gear as often or as far, and fewer trips out of the cab are required for adjustment.