In some of the latest cars available, you can change gears by simply pressing a button, turning a knob or toggling a small joystick. Yet at the same time, plenty of different automobiles still require motorists to use one foot for the clutch pedal and another for the gas, all while using one hand to manipulate the gear-shift lever through a definite design of positions. And many other current cars don’t have any traditional gears at all in their transmissions.

But regardless of whether a vehicle includes a fancy automatic, an old-college manual or a modern-day continuously variable transmitting (CVT), each unit has to do the same work: help transmit the engine’s result to the traveling wheels. It’s a complicated task that we’ll try to make a bit simpler today, starting with the basics about why a transmission is needed in the first place.
Let’s actually start with the normal internal combustion engine. As the fuel-air blend ignites in the cylinders, the pistons start upgrading and down, and that motion is used to spin the car’s Variable Speed Transmission crankshaft. When the driver presses on the gas pedal, there’s more fuel to burn off in the cylinders and the whole process moves quicker and faster.

What the transmission does is change the ratio between how fast the engine is spinning and how fast the driving wheels are moving. A lower gear means optimum functionality with the wheels moving slower compared to the engine, while with an increased gear, optimum performance comes with the wheels moving faster.
With a manual transmission, gear shifting is handled by the driver with a gear selector. Many of today’s cars have got five or six forward gears, but you’ll find older models with anywhere from three to six forward gears offered.

A clutch is utilized to transmit torque from a car’s engine to its manual transmitting. The various gears in a manual tranny allow the car to visit at different speeds. Bigger gears offer lots of torque but lower speeds, while smaller sized gears deliver less torque and allow the car travel quicker.