Editing Manual transmission (section)

===Dog clutch===
In a modern constant-mesh manual transmission, the gear teeth are permanently in contact with each other, and [[dog clutch|dog clutches]] (sometimes called ''dog teeth'') are used to select the gear ratio for the transmission. When the dog clutches for all gears are disengaged (i.e. when the transmission is in neutral), all of the gears are able to spin freely around the output shaft. When the driver selects a gear, the dog clutch for that gear is engaged (via the gear selector rods), locking the transmission's output shaft to a particular gear set. This means the output shaft rotates at the same speed as the selected gear, thus determining the gear ratio of the transmission.<ref>{{cite web |title=How Manual Transmissions Work |url=https://auto.howstuffworks.com/transmission4.htm |website=www.howstuffworks.com |access-date=7 June 2020 |language=en |date=1 April 2000}}</ref>

The dog clutch is a sliding selector mechanism that sits around the output shaft. It has teeth to fit into the [[Spline (mechanical)|splines]] on the shaft, forcing that shaft to rotate at the same speed as the gear hub. However, the clutch can move back and forth on the shaft, to either engage or disengage the splines. This movement is controlled by a selector fork that is linked to the gear lever. The fork does not rotate, so it is attached to a collar bearing on the selector. The selector is typically symmetric: it slides between two gears and has a synchromesh and teeth on each side in order to lock either gear to the shaft. Unlike some other types of clutches (such as the foot-operated clutch of a manual-transmission car), a dog clutch provides non-slip coupling and is not suited to intentional slipping.