In some of the latest cars on the market, you can shift gears by simply pressing a button, turning a knob or toggling a little joystick. Yet at the same time, plenty of different vehicles still require drivers to make use of one foot for the clutch pedal and another for the gas, all while using one hand to control the gear-change lever through a distinct design of positions. And many other current cars don’t have any traditional gears at all within their transmissions.
But regardless of whether a vehicle has a fancy automatic, an old-college manual or a modern-day constantly variable transmitting (CVT), each unit has to do the same work: help transmit the engine’s result to the generating wheels. It’s a complicated task that we’ll make an effort to make a little simpler today, you start with the basics about why a transmitting is needed in the first place.
Let’s actually begin with the typical internal combustion engine. As the fuel-air combination ignites in the cylinders, 
the pistons start upgrading and down, and that motion is used to spin the car’s crankshaft. When the driver presses on the gas pedal, there’s more fuel to burn in the cylinders and the complete 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 lesser gear means optimum performance with the wheels moving slower compared to the engine, while with an increased gear, optimum performance includes the wheels moving faster.
With a manual transmission, gear shifting is handled by the driver via a gear selector. A lot of today’s vehicles possess five or six forwards gears, but you’ll discover older Variable Speed Transmission models with anywhere from three to six forwards gears offered.
A clutch is utilized to transmit torque from a car’s engine to its manual transmission. The various gears in a manual transmission allow the car to travel at different speeds. Bigger gears offer plenty of torque but lower speeds, while smaller gears deliver less torque and invite the car travel quicker.