No one knows transmissions & torque converters like
Remanufactured Valve Bodies
What's Hot
4L80-E, 4L85-E
Smart-Tech® Overrun Clutch Valve Kit 34200-40K
Fits units '97-later.
-
Helps cure:
- No Forward
- OD roller clutch failure
- Overrun clutch distress
6L45
Manual Valve Assembly 104740-24K
Fits BMW units only.
-
Helps cure:
- No Forward
- No Reverse
- Gear ratio codes
4L60 (700-R4) (298mm) Performance Converter
258mm Damperless Multi-Plate Racekit GM-RK-498
Street/Strip applications only. For use with GM 258mm early stators only.
- Unit Size: 300mm
- Core: GM 258mm
- Dampered: No
- Lockup: Multi-Plate
- Clutch Material: HTE
- Turbine Hub Input Spline Count: 30
Latest News
Learn How to Prevent Comebacks with Non-Valve-Body Vacuum Testing
Did you know that there are other areas of the transmission – aside from the valve body – that can be tested for leaks by vacuum testing? The ability to unmask these leaks is a must-have weapon in your arsenal for fighting against comebacks. From checkballs to shafts and every hydraulic circuit in between, identifying and repairing internal leaks while the unit is apart on the bench is no longer a guessing game.
Click here to learn more!
New Torque Converter Journal: Get Answers to Your Biggest Questions About Woven Carbon Friction Rings
Check out the latest edition of the Sonnax Torque Converter Journal to:
- Get answers to your biggest questions about woven carbon friction rings
- Explore the new parts guide
- Find out who’s retiring from Sonnax and view his top 10 tech articles
- Catch up on the latest exploded views
View Now
Sonnax Closed on Labor Day
Sonnax will be closed Monday, Sept. 4 in observance of Labor Day. Normal business hours will resume Tuesday, Sept. 5. Wishing you a safe, happy holiday weekend filled with family, friends and fun!
Upcoming Events
SEMA Show 2017
Las Vegas, NV
October 31, 2017, 9:00AM - 4:00PM
Learn MorePRI Show 2017
Indianapolis, IN
December 07, 2017, 9:00AM - 4:00PM
Learn MoreSonnax Industries is an Employee-Owned Company
Sonnax’s mission is to be the leading supplier of innovative drivetrain components to the automotive aftermarket by developing quality solutions that serve customer needs.
Sonnax Industries manufactures first-class products to go along with their excellent customer service.
J. Paradise
HL Performance Converters
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
You can’t fix transmissions without Sonnax.
Lou
Lou Vari Transmission
Youngstown, OH
We love your products. I used honda PR valve and end plug kits and they work wonderful, so now we use them with every rebuild.
K. Diap
ANS Transmission
Toronto, Ontario