No one knows transmissions & torque converters like

Sonnax designs, develops and manufactures the highest quality aftermarket automotive products. We are the world’s largest full-line supplier of torque converter parts, and offer transmission and specialty driveline components through a global network of parts distributors.

Featured Products Where to Buy
34200 40k web

4L80-E, 4L85-E

Smart-Tech® Overrun Clutch Valve Kit 34200-40K

Fits units '97-later.

99740 07k

AS68RC

Manual Shaft Kit 99740-07K

Fits Dodge units only.

6l45 6l90 zip

6L45, 6L50, 6L80, 6L90

Zip Kit® 6L45-6L90-ZIP

Latest News

December 13, 2018

Sonnax Holiday Hours

From all of us at Sonnax, thank you for another amazing year! We truly appreciate your support, and look forward to working together again in 2019. 

Holiday Hours:

    Dec. 24: Closed
    Dec. 25: Closed
    Dec. 31: Closed
    Jan. 1: Closed

Happy holidays and best wishes for the New Year!

December 03, 2018

Holiday Giveaway – Enter Now Through Dec. 31

We're giving away a $100 Visa gift card and prize pack full of cool Sonnax swag to three lucky fans!

Here's how to enter:
You can either enter on our Facebook page, or you can send an email to pickme@sonnax.com telling us which Sonnax product you like best and why. It’s that easy!

You have until 11:59 p.m. on Dec. 31 to submit your entry. Three lucky winners will be chosen at random and announced on Friday, Jan. 4. 

Good luck and Happy Holidays from all your friends at Sonnax!

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October 24, 2018

Governor Meets with New Ownership at Sonnax

Sonnax President Steve Boyer met with Governor Scott and Brattleboro Development Credit Corporation Executive Director Adam Grinold on Tuesday as part of Windham County Capitol for a Day.

“We were honored to welcome Gov. Scott to Sonnax and eager to show him the high-quality products and operations made possible by the entire Sonnax team,” said Sonnax President Steve Boyer. “We are pleased to work with government and business development leaders for the continued growth of our state, regional, and local economies.”

“Our Capitol for a Day initiative is about getting outside Montpelier, so we can listen to and learn from Vermonters around the entire state, and better understand their unique challenges and opportunities,” said Governor Scott. “And as my Administration makes expanding and strengthening Vermont’s workforce a top priority, it was incredibly valuable to hear from BDCC and Sonnax leadership about the workforce needs in the region, and the regional efforts to recruit and train Vermonters for the good jobs available today.”

About Capitol for a Day:
The Governor, along with members of his cabinet and extended cabinet, spend the day in every county, meeting with area constituents, lawmakers, local partners and state employees throughout the day.

The initiative aims to give regional constituencies direct access to Administration leadership, as well as giving Administration officials an opportunity to visit regional businesses, schools, community organizations and municipal offices. The Administration expects to visit each of the state’s 14 counties throughout the summer and fall of 2018.

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Enjoy a rewarding career and relaxing quality of life
in beautiful Southern Vermont.

Recognized as one of the Best Places to Work in Vermont and recipient of the Governor's Worksite Wellness Award, Sonnax is a leading supplier to the automotive aftermarket. We design, manufacture, test and distribute a wide variety of innovative, high quality products used to remanufacture torque converters, rebuild automatic transmissions, upgrade driveshafts and protect the driveline from over-torque damage.

Sonnax is one of the fastest growing companies in the state of Vermont. Our name has become synonymous with exceptional service, cutting-edge designs, technical knowledge and customer dedication. Join an exciting front-line team focused on developing and delivering the best products in the industry, a team whose imagination, hard work and results are rewarded.

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