In a few of the Variable Speed Drive Motor latest cars out there, you can change gears by simply pressing a button, turning a knob or toggling a little joystick. Yet simultaneously, plenty of different automobiles still require motorists 
to make use of one foot for the clutch pedal and another for the gas, all when using one hand to manipulate the gear-change lever through a distinct pattern of positions. And several other current vehicles 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 constantly variable tranny (CVT), each unit must do the same job: help transmit the engine’s output to the driving wheels. It’s a complex task that we’ll try to make a bit simpler today, you start with the fundamentals about why a transmission is needed to begin with.
Let’s actually start with the normal internal combustion engine. As the fuel-air mixture ignites in the cylinders, the pistons begin moving up and down, and that motion 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 faster 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 overall performance with the tires moving slower than the engine, while with a higher gear, optimum performance comes with the wheels moving quicker.
With a manual transmission, gear shifting is handled by the driver via a gear selector. Many of today’s cars have five or six forwards gears, but you’ll discover older models with from three to six forwards gears offered.
A clutch is utilized to transmit torque from a car’s engine to its manual tranny. The various gears in a manual transmission allow the car to visit at different speeds. Larger gears offer plenty of torque but lower speeds, while smaller sized gears deliver much less torque and invite the car travel quicker.
