Traditional gearboxes commonly have two sets of gears: enter and output. the enter & the output. The input gears are fixed around the countershaft, earning them one units. It drives the person gears on the main shaft, which rotate freely on the bearings. Spur and helical gears are used https://stephenskwhu.atualblog.com/40047284/the-definitive-guide-to-gearbox