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.

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Enter a Sonnax part number below to view its instructions. For general reaming instructions, click here.

Latest News

November 10, 2020

Shop the New Sonnax Fan Store

Get your official Sonnax gear in the new Sonnax Fan Store!

Choose from three cool designs including the popular Sonnax Performance and scary valve body designs, plus a brand new drivetrain design! All designs are available as a lightweight T-shirt, heavyweight T-shirt, v-neck T-shirt, or cozy hoodie. 

Click here to shop now!

 

September 14, 2020

Introducing the Sonnax Tool Shop

Through customer calls, emails, surveys, and conversations at industry events, we heard you loud and clear: some Sonnax tools have been hard to get, and the prices were too high. We brought your concerns to our distributor partners, and worked together to build the Sonnax Tool Shop.

The goal of this program is simple: help you get the tools you want, when you want them, at a fair price. The Sonnax Tool Shop includes 70+ popular F-tool  and vacuum testing products with new, lower MSRPs and greater distribution at local branches and regional distribution centers.

“At the Sonnax Tool Shop, the price you see is the price you pay,” says Mark Kaplan, Sonnax Vice President of Sales. “We’re grateful for the support of our network of distributors in offering MSRP-or-better prices and 1-2 day delivery on this selection of tools to all customers in the U.S. and Canada.”  

A key benefit for rebuilders: If a Tool Shop part or kit isn’t readily available from your regular local branch, you can call other Sonnax distributors without worrying that you’ll have to pay more.

Check out the complete list of included tools and MSRPs here: Sonnax Tool Shop

 

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July 29, 2020

Introducing the Sonnax Zip Valve™

Need or prefer a drop-in repair for common shift problems? 

Introducing Zip Valve™ products – a new brand covering the hundreds of drop-in valves and Zip Kits rebuilders have trusted for years to overcome chronic transmission problems. These easy-to-install components deliver quality and performance that can’t be beat thanks to upgraded Sonnax design features, improved materials and precision manufacturing. 

More than 350 different products covering 200-plus transmissions are available, and it’s easy to identify these parts anywhere on the Sonnax website by the new, drop-in “ZIP” logo that accompanies each one. Just like you can narrow down search results by unit or part type, choosing to display only Zip Valves is now another option for quickly finding just the right repair. 

“At Sonnax, we strive to have the best selection of highest-quality solutions available for our customers.” says Sonnax President Steve Boyer. “When you’ve got a build on your bench, it’s our job to provide you with a wide range of options you can trust.”

Find the right Zip Valve products for your next build here: https://www.sonnax.com/zip_valve

 

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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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