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What Is A Torque Converter And How Does It Work?

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When the topic of Mercedes Benz transmission repairs and replacements comes up, experts also tend to bring up the torque converter. This leaves amateur Mercedes Benz owners at a loss and unsure of what their peers are talking about. Of course, there is no shame in admitting certain terms are new to your vocabulary, but it is also an amazing feeling to contribute something to the conversation.

For newbies who want to impress seasoned car owners with knowledge about automatic transmission repairs, here’s everything you need to know about torque converters:

What Is It?

When talking about automatic transmissions, the torque converter functions as a type of interface that interacts with both the car’s engine and the gearbox. In terms that are easier to understand, the torque converter is comparable to the manual clutch. This part of the car allows the transmission and engine to turn in any speeds when it is necessary.

The torque converter prevents the stalling of the engine when the vehicle is driven at low speeds.

Why Is It Needed?

A combustion engine, although powerful in its own right does not have the ability to produce enough torque that will allow a heavy car to move from being still. Since engines require a minimum speed to run continuously, the torque converter comes into use. Even at low speeds, the engine will not stall, thanks to this specific car part.

Are Converters Found In All Cars?

No, torque converters are not found in all car transmission, they are only found in automatic transmissions because manual cars have the clutch to prevent stalling. The driver is in full control of the clutch for manual transmission cars and must know the proper time to engage and disengage.

Some electric cars also do not have torque converters because they have no use for it. Certain electric cars have the ability to produce their own full torque necessary to move the car. Lastly, there are also automatic vehicles that were designed specifically to function without the need for a torque converter. These vehicles are known as continuously variable transmission (CVT) and dual clutch transmission (DCT). They do not need the converter because the car’s transmission already works as its own interface.

How It Works

The converters sealed within the transmission and are usually invisible to everyone, except a trained mechanic. The torque has two fans facing each other, fan #1 known as the impeller blows wind, #2 the turbine spins, but even when the turbine isn’t spinning, the impeller is still functioning.

The impeller is the fan connected to the engine while the turbine is the one connected to the input shaft of the transmission. When the turbine is moving and the vehicle is not on park or neutral, the car will move. What sets these fans apart is their medium, instead of relying on air to move, it uses liquid, also known as the transmission fluid.

To ensure the torque converters are in excellent condition, get them checked and replaced regularly. offers excellent and affordable Mercedes Benz transmission torque converts for all your car’s needs.

Browse through Adsit’s catalog of Mercedes Benz transmission parts at Don’t hesitate to contact us if you have questions.


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As a mechanical engineer turned blogger, Charlie provides readers with a technical, yet accessible look into the world of automotive engineering and design. His insightful posts make complex car technologies understandable.