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.
February 08, 2018
Harness that Horsepower! Your Guide to a Sonnax 4L60/E Level 3 Performance Build
Topics: Rebuilding Tips Transmission GM 4L70-E Transmission 4L60-E Transmission 4L65-E Transmission
Watch NowSeptember 27, 2017
Sonnax Roadshow Part IV: Additional Valve Body Repair Issues
Randall Schroeder
Topics: Diagnostics And Theory Rebuilding Tips Transmission
Watch NowSeptember 27, 2017
Sonnax Roadshow Part III: Valve Body Reaming
Randall Schroeder
Topics: Diagnostics And Theory Rebuilding Tips Valve Body Reaming Transmission
Watch NowSeptember 27, 2017
Sonnax Roadshow Part II: Isolating the Problem – Methods to Identify Bore Wear
Randall Schroeder
Topics: Diagnostics And Theory Rebuilding Tips Transmission
Watch NowSeptember 27, 2017
Sonnax Roadshow Part I: Diagnostic Challenges – Where Do You Start?
Randall Schroeder
Topics: Diagnostics And Theory Rebuilding Tips Transmission
Watch NowAugust 15, 2017
Basic Installation Steps for the Smart-Tech® Overrun Clutch Valve Kit
Topics: Rebuilding Tips Transmission GM 4L85-E Transmission 4L80-E Transmission
Watch NowMay 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
Watch NowMay 09, 2017
From the Bench: Building a World‑Class Powerglide Racing Transmission
Topics: Diagnostics And Theory Transmission GM Powerglide Transmission
Watch NowApril 26, 2016
Prevent "Mystery" Powerglide Band Failures by Overcoming the Servo Pin Bias Effect
Topics: Diagnostics And Theory Transmission GM Powerglide Transmission
Watch NowFebruary 22, 2016
Eliminate 3-4 Clutch Failure with the Smart-Tech® Input Housing
Topics: Diagnostics And Theory Transmission GM 4L70-E Transmission 4L60 Transmission 4L60-E Transmission 4L65-E Transmission
Watch NowDecember 11, 2015
Introducing the Sonnax 48RE Converted Valve Body
Topics: Miscellaneous Remanufactured Valve Bodies Transmission Chrysler 48RE Transmission 46RE Transmission 47RE Transmission
Watch NowOctober 06, 2015
Protect Against Breakage with the Dodge Diesel Extreme Duty Output Shaft
Topics: Diagnostics And Theory Transmission Chrysler 48RE Transmission
Watch NowOctober 06, 2015
Increase Torque & Load Capacity with Confidence - Install the Dodge Diesel Extreme Duty Intermediate Shaft
Topics: Diagnostics And Theory Transmission Chrysler 48RE Transmission 47RH Transmission 47RE Transmission
Watch NowOctober 06, 2015
Unmatched Durability & Performance with the #1 Dodge Diesel Heavy Duty Input Shafts
Topics: Diagnostics And Theory Transmission Chrysler 48RE Transmission 47RH Transmission 47RE Transmission
Watch NowMay 22, 2015
Stop 4R70W Drum Failure with the Smart-Tech® Forward Clutch Drum
Topics: Diagnostics And Theory Transmission Ford 4R75W Transmission 4R70W Transmission 4R70E Transmission 4R75E Transmission
Watch NowMarch 09, 2015
GM 6L80 Series Transmission Upgrades & Repairs
Topics: Diagnostics And Theory Transmission GM 6L90 Transmission 6L80 Transmission 6L50 Transmission 6L45 Transmission
Watch NowJanuary 05, 2015
How to Vacuum Test Video - Part 3 of 3
Topics: Vacuum Testing Transmission
Watch NowJanuary 05, 2015
Vacuum Test Stand Setup & Calibration Video - Part 2 of 3
Topics: Vacuum Testing Transmission
Watch NowJanuary 05, 2015
What is Vacuum Testing? Video - Part 1 of 3
Topics: Vacuum Testing Transmission
Watch Now