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Thread: 06 tbss 4l80 help

  1. #1
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    06 tbss 4l80 help

    OS 12606494 TCM 24235341

    06 TBSS 6.0

    Swapped a 4l80e in, did the pin swap u to s, discarded s, relay for 2-3, and tcc pwm relay, stays in third, even after stopping.

    getting codes p0787 and p0961

    Appreciate anytime spent
    Andrew

    AndrewTBSStune7313.hpt

  2. #2
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    No tune attached...post it up and Ill take a look.

    It's more than just a single pin swap, IIRC it's 3 pins that need to be swapped/removed.
    ~Erik~
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  3. #3
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    what did i miss from above?, forgot to mention i have an adapter harness on the trans end too


    AndrewTBSStune7313.hpt

  4. #4
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    Ok, how exactly is your setup connected then? If you're using a harness, not sure you need to do ANY pin swaps...
    ~Erik~
    2013 Sonic RS - manual, CGM, 6M, sunroof, mods in process
    2008 TrailBlazer 3SS AWD LS2, loaded, dropped, modded, SE22 Performance tuned. And then some...
    2002 TrailBlazer LT 4WD 4.2L I6, lifted, tires, exhaust, SE22 Performance tuned

  5. #5
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    -pin 45 moved to pin 26 on the tcm
    -on the trans adapter harness pin U goes to S on the trans
    -ISS is pinned to the tcm pin 26 and 3
    Last edited by maperformance; 10-01-2013 at 01:26 PM.

  6. #6
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    Need to move T (60E TCC on/off) to S (80E TCC PWM).
    Discard S (on 60E/harness), not used on 80E (looks like you did this).
    Relay mod to invert the 2-3 signal (looks like you did this).

    In your first post you said you used the 60E TCC PWM signal with a relay to make it an on/off as the 80E TCC is an on/off setup. Is this correct? Might be worth it to try using the T -> S pin swap if you can.


    That file doesnt open for me, says it failed the validation check. Running the latest 2.24.241.
    ~Erik~
    2013 Sonic RS - manual, CGM, 6M, sunroof, mods in process
    2008 TrailBlazer 3SS AWD LS2, loaded, dropped, modded, SE22 Performance tuned. And then some...
    2002 TrailBlazer LT 4WD 4.2L I6, lifted, tires, exhaust, SE22 Performance tuned

  7. #7
    Senior Tuner DSteck's Avatar
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    You're going to have issues unless you change the programmed gear ratios... Unless you disable the ISS.

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