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.
Where to BuyView Sonnax Part Instructions
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
Roller Bearing Slip Yoke T3-3-2431CBH
For roller bearing tail housing. TH400, 4L80-E, Powerglide with 32-spline.
Which Kit is Right for Your Rebuild?
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
Latest News
VIDEO: A Holiday Greeting from Sonnax
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!
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 Facebook, or you can send an email to [email protected] telling us one reason why you're a Sonnax fan. 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. 3.
Good luck, and Happy Holidays from all your friends at Sonnax!
Sonnax Closed for Thanksgiving
Sonnax will be closed Nov. 28-29 in celebration of Thanksgiving. Wishing you a very happy holiday filled with great food, fun and company!
Upcoming Events
ATRA Technical Seminar
5400 John Q. Hammons Dr. NW, Concord, NC
February 01, 2020, 8:00AM - 4:00PM
Learn MoreATSG Technical Seminar
2001 Valley View Lane, Irving, TX
February 01, 2020, 9:00AM - 4:00PM
Learn MoreATSG Technical Seminar
1345 Treat Blvd., Walnut Creek, CA
February 08, 2020, 9:00AM - 4:00PM
Learn MoreI 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
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.
Careers at SonnaxAll of Sonnax product lines are top notch. I use Sonnax on all my builds.
F. Lane, FastLane Racing Transmissions