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Thread: VSS from Speedo to ECM or DRAC/VSSB 4L60E

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  1. #1
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    VSS from Speedo to ECM or DRAC/VSSB 4L60E

    On my S10 pickup '7427 conversion , I used the VSS behind the dash cluster and inputed it to the '7427 via F13 , Everything worked fine . it is a stick box however.

    So I guess my question , is do I have to run a VSSB/DRAC to control a 4L60E ? Or will the input at F13 be OK for a speed siginal for the 4L60E ?

    Sorry for the thread Jack Mark :)

    TOM

  2. #2
    RIP EagleMark's Avatar
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    We're used to hijacked threads around here, but that's a good question and I think I'm going to make a topic out of it... It would boil down to what signal comes from VSS behind speedo, most all I know of went to DRAC/VSSB

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
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  3. #3
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    Cool , Thanks Mark

    The output from the cluster mount optical VSS is 2000PPM that I inputed into F13 , it is what the PCM wanted to see there so all works well.

    I just have to wonder if all of the '60e controls will work with just that input ....

    TOM

  4. #4
    Super Moderator Six_Shooter's Avatar
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    You must use the VSS in the tranny through a DRAC, for tranny control. The 40 PPR pulse is what is needed for proper tranny function. I don't recall which pin that is on, but using only the F13 pin will not control the tranny.
    The man who says something is impossible, is usually interrupted by the man doing it.

  5. #5
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    Quote Originally Posted by Six_Shooter View Post
    You must use the VSS in the tranny through a DRAC, for tranny control. The 40 PPR pulse is what is needed for proper tranny function. I don't recall which pin that is on, but using only the F13 pin will not control the tranny.
    Damnit :(

    Alas , I cannot use the factory speed sensor ...... Oh well :(

    TOM

  6. #6
    Super Moderator Six_Shooter's Avatar
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    Why not? The 4L60E will have the VSS already installed.
    The man who says something is impossible, is usually interrupted by the man doing it.

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