In a few of the newest 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 motorists to use one foot for the clutch pedal and another for the gas, all when using one hand to manipulate the gear-shift lever through a distinct pattern of positions. And several other current cars don’t have any traditional gears at all within their transmissions.

But regardless of whether a vehicle includes a fancy automatic, an old-school Variable Speed Drive Motor manual or a modern-day continually variable transmitting (CVT), each unit has to do the same work: help transmit the engine’s output to the generating wheels. It’s a complex task that we’ll make an effort to make a bit simpler today, starting with the basics about why a tranny is needed in the first place.
Let’s actually start with the typical internal combustion engine. As the fuel-air blend ignites in the cylinders, the pistons start upgrading and down, and that movement 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 lower gear means optimum overall performance with the tires moving slower compared to the engine, while with an increased gear, optimum performance comes with the wheels moving quicker.
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 models with from three to six forward gears offered.

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