A rotating component transmits power from the engine to the differential gear, which then drives the wheels. This crucial link, often tubular, bridges the gap between these two components, accommodating relative motion between them due to suspension articulation and chassis flex. In vehicles with the engine and differential located far apart, like trucks or buses, multiple such components might be connected in series.
This mechanical linkage is essential for vehicle propulsion, enabling efficient power transfer and smooth operation. Its development was pivotal to the evolution of automotive technology, allowing for greater flexibility in vehicle design and improved handling. Durability and reliability are paramount in its design, as failure can lead to complete loss of drive. Different materials, including steel, aluminum, and composites, are used based on application requirements, balancing weight, strength, and cost.