Да и на 2вэй он должен ехать только прямо, либо иметь дико большой радиус поворота.
Ты тоже не прав :-) Отличие 2 вэй от 1,5 вэй не в этом.
With the 1.5-way, the LSD functions most during acceleration, and is weaker when not accelerating. (The 1.5-way is designed for novices, since vehicle control becomes more difficult when the engine is used to brake.)
With the 2-way, the LSD functions when not accelerating as well, providing excellent vehicle control under a variety of conditions.