In a few of the newest cars out there, you can change gears simply by pressing a button, turning a knob or toggling a little joystick. Yet at the same time, plenty of different automobiles still require drivers to make use of one foot for the clutch pedal and another for the gas, all when using one hand to control the gear-change lever through a definite design of positions. And several other current cars don’t possess 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 continually 
variable transmitting (CVT), each unit must do the same work: help transmit the engine’s output to the traveling wheels. It’s a complicated task that we’ll try to make a little simpler today, you start with the fundamentals about why a transmitting is needed to begin with.
Let’s actually start with the typical internal combustion engine. As the fuel-air blend ignites in the cylinders, the pistons begin moving up and down, and that movement is utilized to spin the car’s crankshaft. When the driver presses on the gas pedal, there’s more fuel to burn off 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 overall performance with the tires moving slower compared to the engine, while with a higher gear, optimum performance Variable Speed Drive Motor includes the wheels moving faster.
With a manual transmission, gear shifting is handled by the driver with a gear selector. A lot of today’s vehicles 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 used to transmit torque from a car’s engine to its manual tranny. The various gears in a manual tranny allow the car to visit at different speeds. Bigger gears offer plenty of torque but lower speeds, while smaller sized gears deliver less torque and invite the car travel quicker.