A Simple Explanation of How A Transmission System Works – Part I of III

Transmission Operation Diagram

Now that you are familiar with the different shafts in the transmission, here are the other components which complete its design.

  • Gears: The gears are toothed wheels which are used to change the relation between the speeds of the engine and the wheels. The driver can select any one of the gears to control the speed of the vehicle. These gears are placed on bearings allowing them to spin on the shafts. They are not attached to the splined shaft. In case the car is in motion with the engine turned off, the shaft is the only part which moves whereas the gear and layshaft remain stationary.
  • Collar: The collar is used to attach the splined shaft to one of the two available gears. The splines connect it to the shaft and enable it to spin along with the shaft. The collar is quite mobile and can slide to either side in order to connect the gears.
  • Dog teeth: These are grooves on the collar which can easily lock onto the holes of the gears and engage them in order to power the vehicle.
  • Gear selector fork: The gears on the shift lever are connected to the collar through a gear selector fork. When you select any one of the gears, you move the dog teeth slide in and out of mesh.

2-speed transmission engines are a rarity with 5-speed versions becoming the norm. However, the components remain the same with an additional two or three gears and a more complex model of the transmission.

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