What is a car’s drivetrain?

In simple terms, your car’s drivetrain connects the engine to the wheels and makes your car move. It’s made up of several critical components:

• Transmission - Transmits power from the engine to the wheels and allows for gear shifting

• Driveshaft - Connects U-joints, transmission, and other parts to deliver power and torque

• Differential - A gear system that distributes power equally to your wheels

• U-joints - Flexible joints connecting the driveshaft to the transmission for smooth movement

• Axles - Heavy-duty rods that support vehicle weight and rotate the wheels

• CV joints - Constant velocity joints that allow wheels to turn and the suspension to move freely

What’s the difference between drivetrain and powertrain?

The drivetrain refers to the system of components that transfer power from the engine to your wheels. The powertrain is a broader term that includes both the drivetrain and the engine itself.

How do you know if you have a front or rear differential?

It depends on your vehicle type:

• Front-wheel drive cars - Have a differential at the front of the driveshaft

• Rear-wheel drive cars - Have a differential between the rear wheels

• All-wheel and four-wheel drive vehicles - Can have both front and rear differentials

What are the signs of drivetrain problems?

If you notice any of these symptoms, it’s time to get your drivetrain inspected:

• Vibrations or shaking under the car

• Squeaking from worn or unlubricated joints

• Difficulty turning the vehicle

• Clinking, knocking, or clunking noises

• Shimmying or shaking during acceleration