Transmission Electro-Hydraulic Control Module (TEHCM):

4L80 Recon Torque ConverterAftermarket Solution

A TEHCM unit combines the functions of the transmission control module, valve body solenoids, and presure and temperature switches into one unit. 

Each year, more manufacturers are using TEHCM technology to consolidate functions and incorporate one unit into the transmission as opposed to the four or five separate units. With the increase in usage of this product and vehicles entering into the end of the TEHCM lifespan, there is a growing demand for replacement TEHCM units.

Common Failures:

The OEM version of this product typically fails in 80K - 120K miles. Failure can be caused by:

  • Debris contaminates unit
  • Switch deterioration
  • Solenoids deterioration

Symptoms include:

  • Harsh or delayed shifting
  • Inability to shift gears


Replace the OEM TEHCM with this high-quality, remanufactured Aftermarket alternative.

Exclusive Features

  • Each unit is fully remanufactured and vehicle simulator tested for durability and quality assurance
  • 100% replacement of gaskets, grommets and seals
  • Plug and play design - each Transmission Control Module is programmed to match the vehicle's VIN
  • Programming utilizes the most up-to-date software calibrations available

Application Coverage

Transtar Part Number Transmission Application Year Coverage
A144420B 6T40, 6T45 2008 - 2010
A124420B 6T70 2007 - 2009
A124420C 6T40, 6T45 2010 - 2011
A124420D 6T70, 6T75 2010 - 2013
A104420A 6L45, 6L50, 6L80, 6L90 2010 - 2011
A104420B 6L50, 6L80, 6L90 2007 - 2013
A104420C 6L45, 6L90 2011 - 2013
A104420D 6L50, 6L80 2006 - 2007



  • All Dorman TEHCM units include free priority overnight shipping within the Continental US. Core return freight is also free.

  • When placing your order, use “DONOTPROGRAMTEHCM” as the VIN and we will send out the TEHCM Unit un-programmed.

  • All Dorman TEHCM orders will ship the same day as long as the order is placed by 3:30 PM EST.