What is the Torque Converter and Why is It Causing Me So Many Problems?

December 6, 2019 | By Mister Transmission

What is the Torque Converter and Why is It Causing Me So Many Problems?

If you’ve done any cursory research on transmissions and how they work you may have come across the torque converter. Indeed, if you’ve ever looked up common transmission problems, you will no doubt have seen the torque converter mentioned. What is this mystery component of the transmission? And why is it causing you so many gosh darn problems?

The Torque Converter

The torque converter is a type of fluid coupling. What is a fluid coupling? A fluid coupling, also known as a hydraulic coupling, is a device used to transmit rotating mechanical power. It is an alternative to a mechanical clutch. So, the torque converter is one of these and it transfers rotating power generated by the engine to a rotating driven load. In an automatic transmission vehicle, the torque converter connects the power source to the load. The torque converter is typically located between the engine’s flexplate and the transmission. For a manual transmission vehicle, the equivalent component would be the mechanical clutch.

The main characteristic of a torque converter is its ability to multiply torque. This is key. Simple fluid coupling can match rotational speed but cannot multiply torque. As a result, using a torque converter allows for more power. Some torque converters are also equipped with a “lockup” mechanism. A lockup rigidly binds the engine to the transmission when their speeds are nearly equal in order to avoid slippage and a resulting loss of efficiency.

Torque Converter Problems

The torque converter can be involved in a lot of transmission problems. It’s not that these devices are poorly designed, they’re just so integral to the function of the transmission that if something goes wrong, it is probably affected. As an illustration of this, it is standard procedure to replace the torque converter in transmission overhauls. Transmission overhauls, which are also known as transmission rebuilds, involve removing the transmission from the chassis, taking it apart piece by piece, inspecting every piece, cleaning the ones that are still good and replacing the damaged ones. But good technicians don’t take chances on torque converters, they just replace them.

Symptoms Of Torque Converter Problems

Torque converters aren’t always the cause of your transmission problems. In fact, they’re rarely the cause. But they are almost always affected by any problem that your transmission does have. The takeaway from all this: torque converter problems rarely occur in isolation. If you have a problem with your torque converter, you probably have a problem with your transmission more broadly, and should bring your vehicle into a transmission shop for inspection. But how can you know if you have an issue with your torque converter? Well, some of the symptoms of torque converter problems are:

  • Overheating
  • Slipping
  • Shuddering
  • Dirty transmission fluid
  • High stall speeds
  • Strange noises, such as humming, whirring, or clunking

Mister Transmission

At Mister Transmission we have replaced hundreds, if not thousands, of torque converters and we can replace yours too, if necessary. Not sure if your torque converter is the problem? Don’t worry, our Mister Transmission Multi-Check Inspection is bound to find out if there is a problem with your torque converter or any other part of your transmission. To learn more about torque converters or our services, please contact us.

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