Sonnax is an industry leader in the cutting-edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries and industrial sectors utilizing drivetrain technology. Sonnax, a Marmon/Berkshire Hathaway company, serves the aftermarket with both the Rostra Powertrain Controls and Sonnax brands.
What sets us apart from the competition is our passion for quality and innovation. This passion exhibits itself in our long-standing philosophy to address the root cause of a problem, and not just treat the symptoms. In striving to discover what causes common transmission and converter problems, we meld new ideas, materials and state-of-the-art testing to ensure our parts will restore OE performance, or make it better-than-new.
Sonnax Transmission Company headquarters is in Bellows Falls, VT, with production facilities in Laurinburg, N.C. and several technical development centers located across the country.
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Outsmart 4L80-E Overdrive Roller Clutch Failure with the Sonnax Smart-Tech® Overrun Clutch Valve Kit
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