The term “auto LSD” refers to an automatic limited-slip differential. This mechanical component is designed to improve a vehicle’s traction capabilities, particularly in situations where one wheel experiences a loss of grip. It achieves this by automatically transferring torque from the slipping wheel to the wheel with more traction. This mechanism contrasts with open differentials, which can result in all power being directed to the wheel with the least resistance, leaving the other wheel stationary. An example includes a vehicle encountering a patch of ice; an automatic limited-slip differential would attempt to redirect power to the wheel on a surface providing more grip.
The importance of such a system lies in its ability to enhance vehicle control and stability, especially in challenging driving conditions. Benefits include improved acceleration on slippery surfaces, increased off-road capability, and enhanced handling during cornering. Historically, these types of differentials were found primarily in performance vehicles or off-road trucks. However, with advancements in technology and a greater emphasis on safety, they are becoming increasingly common in everyday passenger vehicles.