The 1 sliding Doggy clutch is put in between the clutch equipment and the 2nd equipment, and another is put in between the main gear and reverse gear. All gears are absolutely free around the splined key shaft. The sliding mesh gearboxes have been typically used in the olden days. https://rylanrtrok.shoutmyblog.com/33090693/not-known-details-about-automobile-gearbox