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Our mission is to make exceptional torque converters while providing unparalleled knowledge and outstanding customer service. We are driven to continually improve and raise the bar with our products, relentlessly pursuing perfection. We are a team, we are family, we are Circle D Specialties. Our performance moves us.

Our state of the art torque converter technology & manufacturing facility allows us to take purpose built drag racing torque converters to previously unheard of levels of performance.This technology trickles down into our products for the street car enthusiast as well. With the powerful combination of our CFD modeling software, SolidWorks design, 5-axis CNC-machining, & comprehensive data analysis (all done right here in-house at our Houston, Texas facility) we have the ability to custom tailor & tune torque converters to the highest degree for each unique combination.

Tech articles

  • 4L80 Torque Converter Clutch Drag?
    January 24, 2023

    4L80 Torque Converter Clutch Drag?

    Let's talk about torque converter clutch drag when using a multi disc torque converter in a 4L80E transmission. We see this issue come up from time to time, especially (but not limited to) in 4L80E applications equipped with a transbrake...

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