In case of sliding mesh gearbox, the output shaft gears continually rotate While using the output shaft whilst in other gearbox, the output shaft gears are mounted with bearings hence these gears rotates separately. Notice how the planet on the best sits reduce as opposed to Earth over the remaining. https://troyvzazx.onesmablog.com/how-gearbox-auto-can-save-you-time-stress-and-money-74399966