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.Where to Buy
Enter a Sonnax part number below to view its instructions. For general reaming instructions, click here.
TWO THUMBS UP. I am a loyal user of Sonnax products and they are a company that puts their customers first. Thank you for great products, and I look forward to future products!B. Cole, Toronto, ON
Uniquely designed to fit all '99-later Chrysler 45/545/65/66/68RFE applications – regardless of OE checkball or solenoid configuration.
Get the best protection against breakage and salvage damaged drums with these simple, affordable kits.
Protect any vehicle at any power level with this easy, direct-replacement upgrade.
For roller bearing tail housing. TH400, 4L80-E, Powerglide with 32-spline.
My customers depend on me to keep their vehicles on the road. I depend on Sonnax to help me do that. Thanks Sonnax!S. Moore, Moore's Transmission
Due to the coronavirus outbreak, non-essential businesses in Vermont have been ordered to shut down. Sonnax, like many aftermarket manufacturers and distributors, has been classified as an essential business. We are currently maintaining normal business hours and operations while keeping our employees safe with heightened hygiene protocols and safety measures. It is our sincere hope that our friends and extended family in the industry remain safe and in good health, and it is our goal to serve you in these uncertain times in a safe and responsible manner. Thank you for your support, and let’s continue working together to keep ourselves and our families safe.
At Sonnax, safety is our #1 priority. Our commitment to the safety and well-being of our employees enables us to fulfill our mission to be the leader in bringing innovative, high-quality drivetrain components to the automotive aftermarket. We have been actively monitoring federal, state and local guidance on COVID-19, and are 100% committed to keeping our employees safe, while supporting and serving our customers. Sonnax is currently maintaining regular business hours and operations, with the following cautionary measures in place:
In addition, Sonnax has provided extra cleaning/sanitizing protocols, providing appropriate Personal Protective Equipment and extra hand sanitizing products that are conveniently located. We have recommended that employees follow the same simple hygiene habits that protect against the seasonal flu virus in order to protect against exposure to COVID-19, including:
Thank you for your cooperation in ensuring the safety and well-being of our employees and customers. What's most important as we move forward in our daily lives is to keep calm and use common sense. Let's work together to keep ourselves and our families safe.
We created a fun video just for you! Santa stopped by Sonnax, and we captured the magic on camera so you can join in on the fun. From our team to yours, thank you for another amazing year. We are truly grateful for your support, and we wish you all the best in 2020. Enjoy the video!
I am a Sonnax fan because no matter if I am rebuilding an everyday transmission or a race transmission, I can trust the quality of the Sonnax parts I choose.C. Lentech, Lentech Automatics
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Sonnax tools save me time, money and come backs, I use them on every rebuild we do in my shop.E. Sebris
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.Careers at Sonnax
All of Sonnax product lines are top notch. I use Sonnax on all my builds.
F. Lane, FastLane Racing Transmissions