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Thread: 2009 Silvy with 4L80E swap ... can someone look over the TCM file?

  1. #11
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    275/55-20 and GU6 3.42 ... I think I used 3.73 when I calculated oops

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  2. #12
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    Here is a 2009 T42 4L80 calibration. It is stock other than the VIN being changed for a project. Maybe this might help.

    Jeff
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    98 GMC RCSB 2WD, Internally stock 305 w/Twin T-3 junkyard Turbos,4L80e,Ramjet intake,42lb.inj., 0411PCM, COS3,4675LBS w/me in it. Best Time on 5 passes-13.01@110

  3. #13
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    Thanks I'll check it out

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  4. #14
    Joe (Moderator) joecar's Avatar
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    Jeff, thanks

  5. #15
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    Hmm that's a lot of stuff that's different. Wonder if I should change vin and flash it after fixing gearing

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  6. #16
    Joe (Moderator) joecar's Avatar
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    In that file the WOT MPH shift parameters are upside down (from the factory).

  7. #17
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    Which table?

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  8. #18
    Joe (Moderator) joecar's Avatar
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    The WOT shift MPH parameters:

    D1011 vs D1061 (and others)
    D2011 vs D2061 (and others)
    D3011 vs D3061 (and others)

    the downshift MPH has to be below the upshift MPH.

  9. #19
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    Quote Originally Posted by joecar View Post
    The WOT shift MPH parameters:

    D1011 vs D1061 (and others)
    D2011 vs D2061 (and others)
    D3011 vs D3061 (and others)

    the downshift MPH has to be below the upshift MPH.
    Thanks will look at it

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  10. #20
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    Is there a 2012 vehicle 4l80e calibration I can use in my t42?

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