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More than Great Products

Created by rebuilders, for rebuilders, Sonnax Technical Resources contains hundreds of valuable articles, videos and more to help you find the best solutions to everyday automotive issues. Whether you’re researching a specific problem with a unit that’s just come into your shop or seeking rebuilding tips and tricks from the pros, this section is where you can easily search 10+ years of free Sonnax tech for answers.

Check back often to see what’s new, or connect with Sonnax to be the first to know about the latest tech resources.

January 17, 2017

Torque Converter Journal: There's a New Hub in Town

Topics: Torque Converter Journals Torque Converter Chrysler Ford GM 66RFE Torque Converter 8L90 Torque Converter 6R140 Torque Converter

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August 03, 2016

Dampered & Damperless Converters – What’s the Story?

Topics: Diagnostics And Theory Torque Converter

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August 01, 2016

Torque Converter Journal: Dampered & Damperless Converters - What's the Story?

Topics: Torque Converter Journals Torque Converter Mercedes Mazda 722.9 (Late) Torque Converter FS5A-EL (FNR5) Torque Converter

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July 27, 2016

Properly Diagnose a 722.6 Shudder in Vehicles with MDS System Engines

Ed Lee

Topics: Diagnostics And Theory Transmission Torque Converter Mercedes 722.6 Transmission 722.6, 722.9 Torque Converter

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March 23, 2016

Six Ways from Sunday: Diagnosing ZF6 & Ford 6R60/80 TC-Related Drivability Concerns

Bob Warnke

Topics: Diagnostics And Theory Transmission Torque Converter ZF Ford ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission 6R80 Transmission 6R60 Transmission

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January 06, 2016

A Slippery Slope - The What (and Why) of Woven Carbon

Topics: Diagnostics And Theory Torque Converter

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January 05, 2016

Torque Converter Journal: A Slippery Slope - The What (and Why) of Woven Carbon

Topics: Torque Converter Journals Torque Converter ZF Allison 1000/2000/2400, 2006-Later Performance Converter Torque Converter ZF8HP55 Torque Converter ZF8HP45 Torque Converter

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August 10, 2015

Fraudulent Parts Warning

Topics: Tech Advisories Torque Converter

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August 05, 2015

Easy Repairs for Overheating Honda/Acura Converters

Topics: Rebuilding Tips Torque Converter Transmission Honda/Acura Honda, Acura 4-Speed, 3-Shaft Transmission Honda, Acura 5-Speed Transmission

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August 04, 2015

Defending the Duramax® Diesel Against Allison® 1000 Stator Weakness

Topics: Diagnostics And Theory Rebuilding Tips Torque Converter Allison 1000/2000/2400, 2006-Later Torque Converter

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July 29, 2015

Torque Converter Journal: Defending the Duramax® Diesel Against Allison® 1000 Stator Weakness

Topics: Torque Converter Journals Torque Converter Allison 1000/2000/2400, 2006-Later Torque Converter 1000/2000/2400, 2006-Later Performance Converter Torque Converter LCT 1000 (Captive Clutch) Torque Converter

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December 09, 2014

Allison® 1000 Converter – Identifying After the Rebuild

Ed Lee

Topics: Rebuilding Tips Torque Converter Allison 1000/2000/2400, Early Torque Converter 1000/2000/2400, 2006-Later Torque Converter 1000/2000/2400, 2006-Later Performance Converter Torque Converter 1000/2000/2400, Early Performance Converter Torque Converter LCT 1000 (Captive Clutch) Torque Converter

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December 09, 2014

20 Years Later: What’s New with 4L60-E PWM Modifications

Topics: Rebuilding Tips Diagnostics And Theory Torque Converter Transmission GM 280mm LU (4L60-E) “VJCX” Torque Converter 300mm (4L60-E) Torque Converter 4L70-E Transmission 4L60-E Transmission 4L65-E Transmission 258mm LU (4L60-E, 5L40-E) Torque Converter 245mm LU (3T40, 3L30, 200C, 4T60-E, 4L60 & E:S-10 only) Torque Converter 298mm LU (250C, 350C, 200-4R, 4L60 & E) Torque Converter

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December 09, 2014

GM 4L60-E Friction Material Options

Topics: Rebuilding Tips Torque Converter GM 280mm LU (4L60-E) “VJCX” Torque Converter 300mm (4L60-E) Torque Converter 258mm LU (4L60-E, 5L40-E) Torque Converter 245mm LU (3T40, 3L30, 200C, 4T60-E, 4L60 & E:S-10 only) Torque Converter 298mm LU (250C, 350C, 200-4R, 4L60 & E) Torque Converter

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November 20, 2014

Torque Converter Journal: 20 Years Later - What’s New with 4L60-E PWM Modifications

Topics: Torque Converter Journals Torque Converter Transmission GM 300mm (4L60-E) Torque Converter

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July 01, 2014

4R70/75W Mystery Bearing Noise

Ed Lee

Topics: Diagnostics And Theory Torque Converter

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April 24, 2013

Bonding BorgWarner Friction Rings

Steve Jaussaud

Topics: Bonding Tips Torque Converter

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March 24, 2013

Salvaging Late-Model 4L80-E Stators

Ed Lee

Topics: Rebuilding Tips Torque Converter GM 4L80-E (Early Single Stator) Torque Converter 4L80-E (Late Single Stator) Torque Converter

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March 16, 2013

Transmission Report: Performance Rebuilds & Converters

Topics: Transmission Report Newsletters Rebuilding Tips Diagnostics And Theory Transmission Torque Converter

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February 21, 2013

Rebuilding the 6R60 is Like Skinning a Cat (There’s More than One Way)

Ed Lee

Topics: Rebuilding Tips Torque Converter Ford 6R60, 6R75W Torque Converter

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