Common gearboxes normally have two sets of gears: input and output. the input & the output. The enter gears are preset over the countershaft, creating them solitary units. It drives the individual gears on the principle shaft, which rotate freely around the bearings. They have a large transmission charge https://garrettfqygn.boyblogguide.com/32831412/how-gearbox-can-save-you-time-stress-and-money