Pet clutch skids on the key shaft to rotate with it. All the equipment within the layshaft is preset with it.  When the left-hand Puppy clutch is introduced to skid towards the left through the gearshift lever, it messes With all the clutch gear, plus the higher-speed gear is achieved. https://donovanwhsbj.bloguerosa.com/32791175/the-definitive-guide-to-gearbox-auto