The load applied to the drive wheels during cornering and acceleration is always different on the left and right. In the normal differential, the torque when the accelerator is on or off works to escape to the drive wheels with less load. This makes it difficult to ensure reliable braking during cornering and vehicle control during acceleration. L. S. D. Detects the difference in the number of revolutions and torque of the left and right wheels, and limits the differential function to reliably transmit traction to the road surface. That is, L. S. D. Is a must-have for sports driving. A 1.5-way (1.75-way for AP1 / 2 only) mechanical type that is easy to handle with a spoon is adopted, and consideration is given to ease of assembly and maintenance. The initial torque at the time of shipment is set to 9 to 9.5 kg (cold). Mechanical L. S. D. Due to its structure, the drive wheel may make a drag noise, the internal gear may make an operating noise, and a vibration noise may be generated.