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Sign up today for the Sonnax Transmission Report Newsletter!

The Transmission Report is a free, 8-page newsletter featuring exciting new Sonnax products, in-depth tech articles with valve body diagnostics, rebuilding tips and tricks from the pros, special case studies and more. This valuable newsletter is mailed three times a year to U.S. residents, and can also be read online.

Continental U.S. only.


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Newsletter Archive

March, 2017

Transmission Report Newsletter

  • Sonnax Voted Tops for Parts & Tools!
  • Outsmarting 4L80-E Overdrive Roller Clutch Failure
  • Two Simple Parts Help Guard Against 4L60/E Clutch & Shift Concerns
  • Protect Against 4T60/65-E Comebacks
  • New Performance Parts & Catalogs
Read Online
October, 2016

Transmission Report Newsletter

  • Turn Your ZF6 Solenoid Cores into CASH!
  • New ZF8 Tech Article
  • ZF8HP45/70 Valve Body Layout
  • Remanufactured Valve Bodies
  • New Toyota and Chrysler Line Pressure Booster Kits
Read Online
July, 2016

Transmission Report Newsletter

  • "See" More, Spend Less with Vacuum Testing
  • Smart-Tech® Performance Upgrades
  • Roadshow Recap
  • Give 'Em the Slip: Avoid Comebacks with Sonnax Slip Yokes
Read Online
March, 2016

Transmission Report Newsletter

  • U341E/F TCC Slip Diagnosis
  • Ford 6R140 Zip Kit®
  • U341E/F Valve Body Repairs
  • 6L80/90 Performance Upgrades
  • Transmission Digest Top 10 Winners
  • 4L60/E Performance Catalog, Vol. 3
Read Online
October, 2015

Transmission Report: Your Source for Quality Remanufactured Valve Bodies

Read Online
May, 2015

Transmission Report: Learn LIVE with Sonnax!

Read Online
February, 2015

Transmission Report: Sometimes the Best Tools are FREE!

Read Online
October, 2014

Transmission Report: Money in the Bank - The GM/Ford Joint Venture

Read Online
July, 2014

Transmission Report: Hit a Home Run Against 55-50/51SN Problems

Read Online
March, 2014

Transmission Report: Top Repair Solutions for All Rebuild Levels

Read Online
September, 2013

Transmission Report: Always Ask for Genuine Sonnax Parts

Read Online
March, 2013

Transmission Report: Performance Rebuilds & Converters

Read Online
October, 2012

Transmission Report: New Sonnax Improvements for the 4L60 3-4 Clutch

Read Online
March, 2012

Transmission Report: Which Kit is Right for Your Rebuild?

Read Online
October, 2011

Transmission Report: Overheating Honda Converters, Vacuum Testing and More

Read Online
July, 2011

Transmission Report: Hitting the Road with the Sonnax Roadshow

Read Online
February, 2011

Transmission Report: Line Pressure Booster Kits and More

Read Online
October, 2010

Transmission Report: SmartShell® and More

Read Online
May, 2010

Transmission Report: The Art of Proper Bore Reaming

Read Online