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Thread: Line Pressure Oddity

  1. #1
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    Default Line Pressure Oddity

    Hi,

    T42 with a 4L70E in a 08 Suburban.

    From the factory, the base line pressures for 1-2 and 2-3 shift (D8101, D8201) are shown as 90 PSI for all pressure patterns and all delivered engine torque. This is the only time I have ever seen this.

    Does this seem right?

  2. #2
    Lifetime Member GMPX's Avatar
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    Default

    For all reading, this is being dealt with via Email too.....
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
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    Default fyi..

    I tried to send you a PM but I am not allowed to ...

    FYI, just wanted to let you know that I haven't gotten any emails from you guys. Maybe I missed it?

  4. #4
    Joe (Moderator) joecar's Avatar
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    Default

    If it's ok, just correspond here in this thread...

  5. #5
    Lifetime Member GMPX's Avatar
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    Sorry, we sent the Email to the wrong address, I resent everything last night.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  6. #6
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    Default any updates?

    Any updates on this?

  7. #7
    Lifetime Member GAMEOVER's Avatar
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    Default

    I have the same oddity in my pressure's....

  8. #8
    Joe (Moderator) joecar's Avatar
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    I have seen the shift pressures set to 90+ psi in various manual transmission files...

    Is this what could have happened... GM accidentally used the wrong cal files...?

  9. #9
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    Default Nope. It's a bug.

    At least in the cal I am working on (4L70E on a 08 Suburban w/T42)

    And Ross knows about it. Last I heard from him is that they are still looking at it.

  10. #10
    Lifetime Member GAMEOVER's Avatar
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    My cal is a 2008 2WD 1500 Silverado 6.0ltr(L76) w/4L70E ECM=E38 & TCM=T42......

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