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4x4 Engagement question

Discussion in 'Technical Chat' started by archerm3, Sep 23, 2015.

  1. Sep 23, 2015 at 10:22 AM
    #1
    archerm3

    #1
    archerm3 [OP] Well-Known Member

    Joined:
    Feb 16, 2015
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    Nebraska
    Vehicle:
    97LX (sold) 15DCSB BRM MT OR(RIP) 09 Tahoe
    Brake controller, Snugtop, Hellwig981, Gentex, custom frame bending and body removal by red light runner.
    Anyone know details on how (2nd gen) the truck's computer decides to engage 4HI and ADD? Is there a specific time delay from switch activation to the 4HI engagement to the ADD sliding over? Is it the same every time? Is there any signal inputs that the computer is waiting for before engaging?

    Just for curiousities sake.
     
    archerm3, Sep 23, 2015
    #1
  2. Sep 25, 2015 at 6:00 AM
    #2
    PSU Taco85

    #2
    PSU Taco85 Señor Member

    Joined:
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    Plasti dipped hootus
    Once the tcase goes into 4wd a limit switch tells the front add to engage.
     
    PSU Taco85, Sep 25, 2015
    #2

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