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Tech Resources

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.

August 23, 2017

First, Do No Harm: Things You Should Know about Performance Servos

Gregg Nader

Topics: Miscellaneous Rebuilding Tips Transmission GM Powerglide Transmission Powerglide, Cast Iron Transmission C4 Transmission C6 Transmission 4L70-E Transmission 4L60-E Transmission 4L65-E Transmission 4L60 Transmission

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August 18, 2017

Reamer Cleaning & Care Techniques

Topics: Shop Practices Transmission

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August 15, 2017

Basic Installation Steps for the Smart-Tech® Overrun Clutch Valve Kit

Topics: Rebuilding Tips Transmission GM 4L85-E Transmission 4L80-E Transmission

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August 01, 2017

Transmission Report: Recognize & Repair Solenoid Accumulators in Late-Model Valve Bodies

Topics: Transmission Report Newsletters Transmission GM ZF 6T40 (Gen. 2) Transmission 6R75 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP19 Transmission 6R60 Transmission 6T70 (Gen. 1) Transmission 6T75 (Gen. 1) Transmission 6F35 Transmission ZF6HP28 Transmission ZF6HP26 Transmission ZF6HP34 Transmission 6R80 Transmission

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July 27, 2017

How to Recognize & Repair Solenoid Accumulators in Late-Model Valve Bodies

Maura Stafford

Topics: Transmission Ford GM ZF 6R75 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP19 Transmission 6R80 Transmission 6R60 Transmission 6T70 (Gen. 1) Transmission 6T75 (Gen. 1) Transmission 6F35 Transmission ZF6HP28 Transmission ZF6HP26 Transmission ZF6HP34 Transmission 6T40 (Gen. 2) Transmission

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July 25, 2017

Identifying Converter Components: 6 Key Features to Understand in Ford E4OD, 4R100 & 5R110W

Ed Lee

Topics: Identification Guides Torque Converter Ford 4R100 Torque Converter E4OD Torque Converter 5R110W, 6-Stud Torque Converter 5R110W, 8-Stud Performance Converter Torque Converter 5R110W, 6-Stud Performance Converter Torque Converter 5R110W, 8-Stud Torque Converter

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June 22, 2017

Outsmarting 4L80-E Overdrive Roller Clutch Failure

Jim Dial

Topics: Miscellaneous Transmission GM 4L80-E Transmission 4L85-E Transmission

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June 02, 2017

GM 6T30, 6T40 (Gen. 2), 6T45 (Gen. 2), 6T50 (Gen. 2) Valve Body Layout

Topics: Transmission GM 6T40 (Gen. 2) Transmission 6T45 (Gen. 2) Transmission 6T50 (Gen. 2) Transmission 6T30 Transmission

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May 26, 2017

Summer Driveshaft Checklist & Upgrades

Topics: Rebuilding Tips Driveline

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May 26, 2017

Get Rock-Solid Reliability & 20% More Torque Capacity with the Smart-Tech® Overdrive Clutch Housing Kit

Topics: Miscellaneous Rebuilding Tips Transmission Chrysler 66RFE Transmission 65RFE Transmission 68RFE Transmission 45RFE Transmission 545RFE Transmission

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May 25, 2017

Chrysler 45RFE, 545RFE, 65RFE, 66RFE, 68RFE Valve Body Layout

Topics: Transmission Chrysler 66RFE Transmission 65RFE Transmission 68RFE Transmission 45RFE Transmission 545RFE Transmission

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May 25, 2017

GM 6T30, 6T40 (Gen. 2), 6T45 (Gen. 2), 6T50 (Gen. 2) Vacuum Test Guide

Topics: Vacuum Test Guides Transmission GM 6T40 (Gen. 2) Transmission 6T45 (Gen. 2) Transmission 6T50 (Gen. 2) Transmission 6T30 Transmission

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May 24, 2017

Your Guide to Summer Towing Transmission Repairs & Upgrades

Topics: Rebuilding Tips Transmission Chrysler Ford GM Toyota/Lexus Transfer Case Parts 68RFE Transmission 545RFE Transmission 48RE Transmission 5R110W Transmission 4R70W Transmission AODE Transmission 4R100 Transmission 6L90 Transmission E4OD Transmission A750E Transmission 4L60-E Transmission 400 Transmission New Process 230 & 240 Series Transmission 4L80-E Transmission 6L80 Transmission 6R140 Transmission

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May 09, 2017

Level Up with Sonnax: 5 Key Powerglide Transmission Areas to Upgrade for Optimum Performance

Topics: Transmission GM Powerglide Transmission

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May 09, 2017

From the Bench: Building a World‑Class Powerglide Racing Transmission

Gregg Nader

Topics: Diagnostics And Theory Transmission GM Powerglide Transmission

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May 05, 2017

Chrysler 45RFE, 545RFE, 65RFE, 66RFE, 68RFE Vacuum Test Guide

Topics: Vacuum Test Guides Transmission Chrysler 66RFE Transmission 65RFE Transmission 68RFE Transmission 45RFE Transmission 545RFE Transmission

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April 28, 2017

4L60/E Performance & Heavy-Duty Transmission Build Charts

Topics: Rebuilding Tips Transmission GM 4L60-E Transmission 4L60 Transmission 4L70-E Transmission 4L65-E Transmission

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April 12, 2017

4L60-E Valve Body Identification Guide

Topics: Identification Guides Transmission GM 4L60-E Transmission

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March 29, 2017

Transmission Report: Sonnax Voted Tops for Parts & Tools!

Topics: Transmission Report Newsletters Transmission GM 4T65-E Transmission 4L70-E Transmission 4L60-E Transmission 4L65-E Transmission 4L80-E Transmission

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March 28, 2017

Stop 4T60-E, 4T65-E Case Wear, Band Slippage & Breakage with a Longer Servo Pin

Jim Dial

Topics: Diagnostics And Theory Transmission GM 4L60-E Transmission 4L65-E Transmission

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