B stands for Brake mode that some models, together with electrical automobiles, give. You can utilize it to decelerate or maintain downhill speed with out utilizing the automobile’s brakes. The change valve is pressurized with fluid from the governor on one facet, and also the throttle valve on the other. https://gearboxauto75307.blog-kids.com/34001265/an-unbiased-view-of-gearbox-auto