As automobiles became extra common, the demand from customers for smoother and much more dependable gearboxes triggered the development of synchronized manual transmissions during the nineteen twenties and 1930s. Also, if you press the shifter sleeve toward the specified equipment, that gear locks onto the primary shaft and rotates it. https://automobile-gearbox73849.blog-a-story.com/14934717/the-basic-principles-of-automobile-gearbox