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Thread: E38 OS with T42 TCM

  1. #1
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    Default E38 OS with T42 TCM

    I've been looking all over and can't seem to find anything on this. I'm currently working on a 2010 Escalade with an E38. Swapped the tranny out for a 4L60 with a T42 and was wondering if anyone has an OS that supports these two things together. Any help would be much appreciated.

  2. #2
    Lifetime Member Tre-Cool's Avatar
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    not sure if this will help. but it comes from a 12597121 ecu.
    Attached Files Attached Files

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    A member recently completed a similar swap ... E38 controlled 2007 Escalade L92 6.2L with T42 controlled 4L70E ... thread below ... long read ... but lots of info ..


    http://forum.efilive.com/showthread....-help-a-newbie


    Regards,
    Taz

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    Lifetime Member swingtan's Avatar
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    All auto based VZ holden 6lt vehicles had this combo, E38 and T42 ( not HSV ). So it's certainly possible.

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    Senior Member doubledip's Avatar
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    Quote Originally Posted by swingtan View Post
    All auto based VZ holden 6lt vehicles had this combo, E38 and T42 ( not HSV ). So it's certainly possible.
    yes but will need to do something with the ISS as the E38 looks for it in the Holden OS's . a 4L60E in a Holden guise doesnt have it fitted and only certain 4L65E's had it fitted... so just beware
    ---------------------------
    E38's got to love them
    E40's hate 'em

    LS1's is there anything it wont work on

    Holden VE SSV - GEN46L

    www.ultimateconversionwiring.com.au

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    The big thing is that the ECM is a 2010 and I cant find a calibration that is compatible with that. Anyone happen to have one?

  7. #7
    Lifetime Member Tre-Cool's Avatar
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    the export holdens to dubui also only had 4 speed auto's too.

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    Hmm why bother swapping to a 4 speed?

    Regardless, you can try running an earlier T42 OS and see if it communicates to the ECM properly. The only issue running a Holden ECM OS is the likelihood of it not playing well with the BCM, cluster, etc in an Escalade. Is this swap in an actual Escalade or is it a swap?
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
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    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

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    Its in an Escalade. The reason for the 4 speed swap is because the 6spds even built dont hold up that well to the power. This thing will be making around 850 at all 4 wheels

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    The Silverado 4.8 Vortec has an A4. That would be the best chance. There is a guy on the Corvette forums that runs consistent low 10's in the brackets with an A6 and has run hi 9's.

    And a few other options here:

    http://archives.media.gm.com/us/powe...10truck_us.htm

    But the Silverado OS's would be the best chance to ensure the ECM and TCM are set with the necessary options to support the rest of the Silverado platform ECU's.

    The 4.8 has 24243357 in the T42 and 12636005 in the ECM. The ECM is the same OS for the A6 as the A4 so you really only need to do a cal flash to the existing E38 OS when you find the right ECM calibration for the A4.
    Last edited by gmh308; October 5th, 2010 at 12:37 PM.

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