At Harold's Used Auto Parts Inc in Philadelphia, PA, transmissions are our specialty. We know exactly how they work and exactly how to maintain and repair one. You know you have a transmission, and you know it’s important, but what does it actually do? Here’s the simple answer to a complicated question.

While it takes years of training or experience to fully understand exactly how a transmission works, in essence it does exactly what the name suggests...it transmits. It doesn’t transmit like a radio tower, but rather it transmits the power the engine generates into a usable form. The engine simply rotates the crankshaft inside it. The transmission is attached to this crankshaft and decides when and how to utilize the force it generates. Transmissions make it possible for you to sit and idle in neutral without moving, or drive forward and backwards and provides a selection of gears that make the car comfortable and efficient to drive. The transmission, through truly genius engineering, makes sure the car moves when you tell it to, and does it in the most efficient way possible. It takes energy created by the engine and puts it to work.

As you can see, your transmission is as essential as the engine or the wheels on your car. Transmissions are comprised of hundreds of components, working together to propel your car down the road. Whether you need a filter change, a fluid flush, a sensor replaced, a problem diagnosis, or any other repair or maintenance, call Harold's Used Auto Parts Inc today. Our expert mechanics will keep your car on the road, reliably, for years to come.