Regular gearboxes generally have two sets of gears: enter and output. the input & the output. The enter gears are fixed on the countershaft, creating them single models. It drives the person gears on the principle shaft, which rotate freely over the bearings. So by locking any one’s gear, https://gearbox19630.wizzardsblog.com/33738054/not-known-details-about-gearbox