• Premium Features

  • Fix Database with 11,494 real life fixes & growing daily.
  • Recently updated to the 3-C's format!
  • new!

    iOS App

  • new!

    Android App

  • Five very active e-mail forums for technical help & management issues.
  • Complete e-mail forum archives from 1997 to current year.
  • Technical Service Bulletins & Tech Tips for most every transmission model
  • Wave Form Library
  • Scanner Movie Uploads
  • Interactive Vacuum Testing Guides
  • TesTech™ Technical Lessons
  • R&R Tips
  • Hard to Find Part Numbers
  • And much more…

TRNW, Transmission Rebuilders Network Worldwide

is an international network of transmission technicians, transmission rebuilders, and transmission shop owners who discuss every aspect of running a transmission repair facility. TRNW members interact on everything from rebuilding tips, diagnostic help, troubleshooting, parts locating, and the art of operating and managing a full-service transmission shop.

TRNW is like having hundreds of transmission rebuilders at your door step to answer your questions. No job is too difficult! TRNW members unite together to help solve the most complicated problems from today's complex, fully electronic, automatic transmissions. Join TRNW today and see what your missing! It's like a seminar in your mail box every day!

TRNW has the most active and the most informative tech forum in the transmission industry! Our members rave about how great our service is, and you will too! Be sure to join TRNW today!

Becoming a TRNW member is Easy and Safe! We use the latest "Verisign" secure encryption technology available. View our Privacy Policy, and our Refund Policy. All participants of this group must agree to the terms of our Terms of Use Agreement.

Transmission Industry News

  • Sonnax introduces two new GM 6L80/90 remanufactured TEHCMs that deliver durable, reliable OE performance at a significant savings over an OE replacement. Every unit undergoes top-quality remanufacturing, rigorous electro-hydraulic testing, and is VIN-blanked for easy programming.
    Part No. GM6L-TEHCM-C5: Typically fits Cadillac 2010-2011, Chevrolet 2010-2013, GMC 2010-2011
    Part No. GM6L-TEHCM-C6: Typically fits Cadillac 2012-2015, Chevrolet 2011-2020, GMC 2011-2020, Isuzu 2012-2016
  • Sonnax releases a new heavy duty "D" clutch backing plate that is 2X thicker than weak, stamped OE backing plates for significantly improved protection against burnup in ZF8HP55/70/75 transmissions. Easy to install with no special tools or machining required!
  • Sonnax unveils a new drop-in S4 clutch control valve kit featuring an added scarf-cut seal at the signal apply end and a lengthened inboard spool at the clutch apply end that seals worn bores and restores proper hydraulic function in 2019-later GM 8L45/90 transmissions.
  • ATSG Confirmed Fix for March: 2019 Chevy 2500 Van with commanded 2nd gear take off Learn more
  • ATSG IN-PERSON TECHNICAL SEMINARS! Feb 25th - Louisville, March 11 - Philadelphia, April 15 - Chicago, May 20 - New York, August 26 - Orlando, Sept 9 - Dallas, Sept 30 - Los Angeles. Learn more
  • Sonnax introduces a new stator bushing to eliminate spinning and premature deterioration for worry-free operation in Ford Gen. 1 and 2 6F35 transmissions.
  • Sonnax releases a new oversized low reverse/overdrive (4-5-6) clutch regulator valve kit to restore correct pressure regulation and combat premature wear in Ford Gen. 1 and 2 6F35 transmissions.
  • Sonnax introduces a new input housing forward sleeve kit to combine with a Sonnax overrun sleeve to greatly increase the maximum strength of the housing and prevent failures in GM 4L60 and 4L60/65/70-E transmissions.
  • Transgo® now offers the first and only 6L80 performance kit for trucks and other HP applications.
  • Performance proven Raybestos® Powertrain GPZ friction clutches are now available for pre-order for Chargers, Range Rovers, and other vehicles equipped with the 8HP45 transmission
  • Raybestos® GPZ friction clutch plates are also available for pre-order on the 8HP51 transmission in the new A9X series Toyota Supra. Learn More
  • Sonnax releases a new pump vane as a cost-effective alternative to replacing an entire pump rotor assembly in GM 6T70/75 (Gen. 1), 10L60/80/90 (Gen. 1 & 2), Ford 6F50/55 and 10R60/80/90 transmissions.
  • Central Valve Bodies is now selling drop-in valve body components and kits! You can sign up to get updates about new product releases. Top quality valve body replacement parts - specializing in drop in applications, no reaming necessary! Learn more
  • Transgo® now offers a long term fix for a common wear area in Toyota transmissions. Learn more
  • ATSG intoduces the New 10R80 TechTran Manual! Available in both print and download, enjoy the manual at your fingertips or on your devices! Learn More
  • Sonnax now offers a new, drop-in solenoid stabilization retainer to replace OE clips in GM 10L60/80/90 (Gen. 1 & 2) and Ford 10R60/80/90/140 transmissions. It provides 32% more casting-to-solenoid surface area for better support, plus a positive stop retainer feature to prevent future collapse.
  • Raybestos® Powertrain announces a new 2020-ON GM 10L1000 transmission GPZ complete unit Clutch Pack® module, designed for enhanced performance beyond OE capabilities. Learn more
  • TRNW launched it's new iOS App! Now available in the Apple App Store!
  • Transgo® now offers a Cooler Flow Bypass Delete Kit for 6R60 & 6R80 transmissions. Learn more
  • Raybestos® Powertrain announces a new Ford 10R140 6.2 & 7.3 Liter Gas GPZ Friction Clutch Pack Module, designed for enhanced performance beyond OE capabilities. Learn more
  • The NEW 2020 Dura-Bond Transmission Catalog is now available for download. CLICK HERE to download!
  • Dura-Bond decided to put this video together to address some of the questions and concerns that we have heard from you guys at the transmission seminars, trade shows, and even from this group.
    Transmission Fixes - "You Asked, We Listened"
  • Sonnax unveils a new, drop-in solenoid stabilization clip insert that can be used with OE retainers to reshape collapsed spring retainers as well as prevent future collapse in GM 9T45/50/60/65 transmissions.
  • Here is a "Teaser" for the upcoming Dura-Bond Video Series "Race Proven...Time Tested",   Hosted by William Dolak! CLICK HERE
  • TRNW launched it's new Android App! Now available in the Google Play Store!
  • Raybestos® Powertrain announces a new Ford 10R60 Transmission GPZ Friction Clutch Pack Module, designed for enhanced performance beyond OE capabilities. Learn more
  • Sonnax now offers a new oversized servo pin kit for use in reconditioned GM 4L60 and 4L60/65/70-E case bores. Matching the longest OE pin length, this chromoly steel servo pin is durable enough for high performance applications as well as stock replacement.
  • Valve Body Pro is proud to introduce their latest innovation: Rebuilt Solenoid Blocks for the 5R55N/W/S, with an additional option for solenoid repair kits with Maxx Fluxx SOLPRO rebuild kits.
  • Seal Aftermarket Products now has the complete overhaul kit for the U250E series transmission with year coverage 2005-2009. Click here for more information
  • Superior now offers a valve body upgrade kit for all 6 solenoid KM's! Part #: STL-175-6. Click here for more information
  • Raybestos® Powertrain introduces a TREMEC TR-9080 DCT Transmission GPZ Friction Clutch Pack Module designed to enhanced performance beyond OE capabilities! The RGPZ-277 friction clutch module features 5 K1 and 6 K2 GPZ TR-9080 transmission friction clutch plates. GPZ friction material is a performance proven friction material in the TR-9080 and was featured in prototype testing in the first 2020 C8 Corvette to achieve 1000 horsepower and a 9 second 1/4 mile track time.
    Learn more
  • Sonnax releases a new drop-in Zip Valve™ signal accumulator piston kit to eliminate shift concerns and burnt clutches in GM Gen. 2 and 3 6T40 and Gen. 2 6T30/45/50 transmissions with no reaming required.
  • Raybestos unveils superior friction plate for Honda transmissions! Click here for more information!
  • Seal Aftermarket Products now has the complete overhaul kit for the AW TF 80SC series transmission with year coverage 2006-up. Click here for more information
  • Superior has introduced an extra thick valve body separator plate for 4R70W & 4R75W! Click here for more details!
  • Transgo® now offers vave body bore end plug kits for 6L45, 6L50, 6L80, & 6L90 transmissions. Learn more
  • Seal Aftermarket Products now has the complete overhaul kit for the ZF5HP19/FL/FLA series transmission with year coverage 1996-up. Click here for more information
  • Superior Transmission Parts is proud to announce their new A618 / 48RE LOW & REVERSE SUPER SERVO! Click here for more info!
  • Seal Aftermarket Products now has the complete overhaul kit for the ZF6HP26 series transmission with year coverage 2001-up. Click here for more information
  • G-TEC proudly announces our optional filter system for all TurboTank and G-TEC heated cooler line flushers in a ready to install kit form. Click here for more information
  • Seal Aftermarket Products now has the complete overhaul kit for the HONDA/ ACURA (Vue 2004-Up) 4 SHAFT, 5 SPEED series transmission with year coverage 2003-Up. Click here for more information
  • Seal Aftermarket Products now has the complete overhaul kit for the VW09M series transmission with year coverage 2006-up. Click here for more information

TRNW Store

G-Tec Heated Cooler Line Flusher

G-Tec Heated Cooler Line Flusher

View Details
Sonnax Vacuum Test Stand

Sonnax Vacuum Test Stand

View Details
VB-Fix Reaming Fixture

VB-Fix Reaming Fixture

View Details
47RE Noise Filter

47RE Noise Filter

View Details
GM Power Relay

GM Power Relay

View Details
Programming Harness

GM 6-Spd Programming Harness Set

View Details
TRNW T-Shirt

Decals, T-Shirts, & Polo Shirts

View Details