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Thread: manual swap tune confusion

  1. #1
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    Default manual swap tune confusion

    Hello!

    I have a blazer I am swapping a manual into, have found matching OS to do a segment paste job and am confused to the tune for the manual transmissions.

    Why does the manual transmission tunes have parameters that would run an automatic? TCC is not in a manual and upshift, downshift options. an its only showing its a 4 speed and the manuals all should be 5 speed. But looking at the rest of the tunes with a manual I see they have the same parameters available. When I did the segment swap, after saving, the segment ID and checksum numbers changed to what the camaro numbers were. So I assumed it flashed correctly.

    Any one know why this is?? Thanks in advance!!

    Alan Hulse

    OEM OS 12208322 4.3 4l60E
    new OS to do segment swap 12212156 from a blazer 4.3 4l60E
    Segment swap was from a camaro tune with matching OS

  2. #2
    Joe (Moderator) joecar's Avatar
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    The tune contains the tables for the auto trans and the (few) tables for the manual trans... and they are not related to each other.

    In a manual trans tune, just use the manual trans tables.

  3. #3
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    Quote Originally Posted by joecar View Post
    The tune contains the tables for the auto trans and the (few) tables for the manual trans... and they are not related to each other.

    In a manual trans tune, just use the manual trans tables.

    Why are they there at all? I've downloaded multiple files with manuals and they all have Auto parameters in there. Honestly don't see anything referring only to manual besides the information box says its a manual..

    Alan

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    Quote Originally Posted by Alan.hulse1984 View Post
    Why are they there at all? I've downloaded multiple files with manuals and they all have Auto parameters in there. Honestly don't see anything referring only to manual besides the information box says its a manual..

    Alan
    Speculating it's so GM could just change things and not have a lot of changes between auto and manual calibrations.

    I'd suggest finding the 12212156 OS for your Blazer as it's definitely got 4L60E, 4L80E, and MT options available.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  5. #5
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Alan.hulse1984 View Post
    Why are they there at all? ...
    I'm guessing GM put them all together to reduce the number of files/definitions.

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