Powertrain

A powertrain is an assembly of every component that pushes your vehicle forward. Your car's powertrain creates power from the engine and delivers it to the wheels on the ground. The key components of a powertrain include an engine, transmission, driveshaft, axles, and differential. 

Engine: 

As the heart of your vehicle, an engine generates power to drive the car. An engine consists of pistons that move up and down inside cylinders and a crankshaft that translates the reciprocating motion into a rotating motion.

Transmission: 

A transmission is a basic component in your car that makes sure the proper amount of power is transmitted to the wheels. Like a car's gearbox, the transmission takes the power from the engine and adjusts it according to driving conditions, ultimately transferring it to the wheels.

Driveshaft: 

A driveshaft is a component that transfers the torque from the transmission to the wheels. To perform this task, it has to work through various angles and change its length to adjust to movement in the suspension.

Axles: 

Axles are an important member of a powertrain. It lies between the wheels and mainly performs two functions: first, it puts up with the weight of the vehicle and it also rotates and transmits the power of the engine to the wheels.

Differential: 

A differential is a part of the rear axle. It allows each rear wheel to turn at a different speed. For instance, the differential is important when turning a corner, as the outside wheel needs to rotate faster than the inside wheel.

The powertrain is crucial. Without the system working properly, your vehicle cannot move forward. To sum up, it's a group of parts that generate, convert, and consume energy to thrust your vehicle into motion.