Puppy clutch skids on the key shaft to rotate with it. All of the equipment around the layshaft is fastened with it.  When the still left-hand Pet dog clutch is brought to skid on the remaining from the gearshift lever, it messes with the clutch gear, plus the higher-speed gear https://ricardodnwgr.win-blog.com/14317437/everything-about-gearbox-auto