ต่อเรื่อง Types ว่ามีแบบใหนบ้าง ที่พูดกันว่า 1 Way, 1.5 Way, 2 Way
Two main types of LSD have been generally used – mechanical (geared or clutch-based) and fluid based (viscous). The latter is gaining ground especially in modern all-wheel drive vehicles, and generally requires less maintenance than the mechanical type.
1 Way
A 1-way notch is cut like an upside down triangle. While the cam can push backward against the tapered edges, expanding the casing, it cannot push forward against the flat surface. Therefore under acceleration torque (cam rotating backwards) it will lock, and under deceleration torque, when the cam is forced to rotate forward due to forces from braking, engine braking, etc.. it will just contact a flat "wall" and the casing will not expand.
1.5 Way
A 1.5-way notch is like an upside down triangle with a half triangle on top of it. During acceleration it will expand the casing at one rate, and during deceleration, it will still expand the casing, but due to the cuts' higher angles, it will require more force to move the casing apart. Therefore, only during Very hard braking will it have enough force pushing it forward to expand the casing.
2 Way
A 2-way notch is shaped like a diamond. It requires almost the same amount of acceleration or deceleration to force the casing apart. Usually, the top cuts are slightly more dramatic, forcing the 2-way to require slightly more deceleration force to push the cam to expand the casing.
