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Latest News

March 22, 2017

What's Next for Vacuum Test Plates? Vote Now!

Sonnax develops every new product with you in mind. Over the past year, we’ve released three vacuum test plates – and we want to hear from you about which applications to cover next. 

Which plates would help your shop the most? 
Vote Now!



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March 08, 2017

Sonnax Website Redesign: New Look, Faster Load Times and More

Why did we do this?
Much like we update our cell phones and computers, Sonnax must periodically update its website to keep up with the latest technology. Over the past year, our web team has been hard at work rebuilding the Sonnax website from the ground up to make it faster and easier to use than ever before.

What are the biggest changes?

  • The navigation and various pages have been redesigned to make it easier to find exactly what you’re looking for. All the information is still there, but some of it may be in a slightly different location.
  • Unit pages now feature torque converter or transmission parts – not both. Ford 6R140, for example now has a 6R140 transmission page as well as a 6R140 torque converter page.
  • Tech resources have been consolidated into one convenient location. Now, valve body layouts, vacuum test guides, articles, videos and more can all be found on our Tech Resources page.

Will my bookmarks/links still work?
Links to part pages, product line landing pages and the homepage are still the same. Unit pages and tech resource links, however, have changed due to the updated navigation structure.

  • If you’re looking for a transmission unit, go here.
  • If you’re looking for a torque converter unit, go here.
  • If you’re looking for tech resources such as articles or videos, go here.

I used to place orders through your website...what should I do now?
Contact your Sonnax sales representative.

Do I need a login/Will my old login still work?
No, you do not need a login to access any data on the Sonnax website anymore.

How do I (or my customers) make a suggestion, offer a comment or ask a question about the website redesign?
Contact us! We welcome all questions and feedback.

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March 01, 2017

It’s Snow Plowing Season Again! Understanding 4L80-E Overdrive Roller Clutch Failure

Plow trucks running GM 4L80-E and Ford 4R100 transmissions often suffer from Overdrive roller clutch failure:

  • Understand how and why it happens
  • Learn how to prevent it to keep comebacks away and protect your warranty

Read now.

February 17, 2017

Sonnax Wins Big in Top 10 Contest – Thanks to YOU!

Every year, Transmission Digest accepts nominations for the top 10 products and tools in the powertrain aftermarket. Readers vote for their favorites to determine the winners. 

The results are in: Sonnax won seven top product awards, and four top tool awards! Thank you all for your trust and support of Sonnax products – we couldn’t have done it without you!

7 Top Products

  • Chrysler 45RFE, 545RFE, 65RFE, 66RFE & 68RFE
    Line Pressure Booster Kit: RFE-LB1
    Get the right amount of pressure, exactly when you need it in both gas and diesel applications.
  • Chrysler 47RE, 47RH, 48RE
    Extreme Duty Intermediate Shaft: 22171B-HD
    Increase torque and load capacity without worrying about shaft fracture in high-horsepower street, towing or competition applications.
  • Chrysler 48RE
    Converted Valve Body: CHR135
    Breakthrough, plug-and-play solution for 48RE valve body shortage.
  • Ford 4R70W, 4R75W & AOD/E
    Smart-Tech® High Capacity Forward Clutch Drum Kit: 76655-01K
    Get 20-40% more clutch capacity – no modifications required!
  • GM 4L60/E Series
    2.84 Ratio Input Carrier Kit: 77284-K
    Ramp up from OE wide ratio to race-ready close ratio for game-changing acceleration on the track.
  • GM 6L80 & 6L90
    1-2-3-4 Piston: 104984-01
    Stronger-than-OE billet aluminum conquers chronic cracking and delivers maximum durability and performance.
  • GM 6T70 & 6T75 (Gen. 1)
    Zip Kit®: 6T70-ZIP
    Target the root cause of multiple drivability issues to get your vehicle back on the road fast.

4 Top Tools

  • Ford 6R60/75/80, ZF6HP19/26/32 & ZF6HP21/28/34
    Solenoid Test Manifold Kit: 95430-VTK
    Take the guess work out of replacing solenoids with quick, easy, cost-effective pass/fail verification of the solenoid's internal sealing integrity.
  • 3-Part Vacuum Testing Video Series
    See how easy it is to master vacuum testing and work with confidence knowing your rebuild is done right the first time.
  • Valve Body Layouts
    More than 40 free, go-to guides make it quick and easy to determine what’s available for the specific unit you’re working on.
  • Webinars
    Free webinars hosted by Sonnax tech specialists deliver trusted transmission expertise straight to your screen.
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January 30, 2017

Top Plow Truck Transmission Repairs & Upgrades

Heavy snow storms, sub-zero temps, and black ice are a few of old man winter’s favorite tricks…and can lead to treacherous driving conditions. Working hard to keep roads safe, plow trucks often burn through transmissions and end up in the shop.

Check out these top transmission repairs and upgrades to get them back on the road and going strong before the next storm hits!

January 30, 2017

New Driveline Catalog Released

Toughen up your driveshaft for long-lasting, trouble-free performance with trusted Sonnax components! From street to strip, on road and off, this brand new catalog features powerhouse parts that deliver the drivetrain strength, performance and durability you need to get power down to the ground:

  • Performance Slip Yokes
  • Flange Yokes 
  • Adaptor Flange Yokes
  • Weld Yokes
  • Bondable Yokes for Carbon Fiber Driveshafts
  • .125” Thick Aluminum Tubing 
  • Repair Bushings/Extensions
  • Driveline Performance Build Charts

Read it online or request a hardcopy today!

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January 17, 2017

Latest Edition of Sonnax Torque Converter Journal Released

Catch up on the latest Sonnax torque converter news in this free, 8-page newsletter. Featured topics include:

  • Performance Converter Kit Catalog
  • Tips for Successful 6R140 Impeller Hub Installation
  • New Parts Guide & Exploded Views
  • Frequently Asked Questions
  • Smart-Tech Overdrive Clutch Housing Kit
  • TCRA Seminar

Read online or request a hardcopy now! 

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January 04, 2017

Top 5 Most Watched Sonnax Videos in 2016

From an inside look at popular 6L80 series transmission upgrades and repairs to how to prevent mystery Powerglide band failures, these top 5 videos have been watched thousands of times by rebuilders all over the world:

1. GM 6L80 Series Transmission Upgrades & Repairs

2.  Easy Pressure Switch Rebuilds for 6L- & Gen. 1 6T-Series Units

3. Sonnax Webinar: ZF6 Gen. 1 & Gen. 2 Identification & Repair Techniques

4.  Eliminate 3-4 Clutch Failure with the Smart-Tech® Input Housing

5. Prevent "Mystery" Powerglide Band Failures by Overcoming the Servo Pin Bias Effect

Explore more popular videos produced just for you by trusted tech specialists. 

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January 04, 2017

Top 5 Most Viewed Sonnax Tech Articles in 2016

There are hundreds of helpful tech resources available online for your viewing pleasure, and this list showcases the top 5 most popular articles over the last year:

1. AW 55-50 / AF23-33: Diagnosis and Valve Body Information

2. Troubleshooting Tips for the 4R44E & 5R55E

3. Diagnosing the Elusive NO REVERSE with the 4L80-E

4. Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits

5. AW 6-Speed FWD

Explore more tech articles written just for you by trusted tech experts. 

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December 29, 2016

Sonnax Holiday Hours

Sonnax will be closed Monday, Jan. 2. Normal business hours will resume Tuesday, Jan. 3.

We'd like to extend our sincerest gratitude and appreciation for your support throughout 2016. We wouldn't be where we are today without you. Best wishes for a happy, healthy, prosperous new year!

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Upcoming Events

ATSG Technical Seminar

April 01, 2017

10220 Regency Circle, Omaha, NE

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ATRA Technical Seminar

April 08, 2017

2020 E American Blvd., Bloomington, MN

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ATSG Technical Seminar

April 08, 2017

6120 Peachtree Dunwoody Rd., Atlanta, GA

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2017 TCRA Seminar

April 21, 2017

2055 Harbor Blvd., Ventura, CA

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