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Thread: 4L80E swap always in 1st

  1. #1
    Senior Member
    Join Date
    Dec 2005
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    107

    Default 4L80E swap always in 1st

    Hey Guys

    The ECU on my 80e swap is always showing 1st gear. Is this normal. I’ll post a log and tun tomorrow. I was stationary and slowly working the car through th gears manually but the ECU shows 1st gear all the time except when i shifted it into second.

    Shouldn’t it show park in park and then through the gears as you move the shifter even if the car isn’t moving?

    Thanks
    Glenn

  2. #2
    Lifetime Member
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    Mar 2006
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    Default

    Mine does that. It's not a problem.


    Sent from my SAMSUNG-SM-G870A using Tapatalk

  3. #3
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    27,785

    Default

    Which pid are you looking at (that shows 1st gear)...?

    GM.PRNDL shows P, R, N, D4, D3, D2, D1
    GM.GEAR shows 1, 2, 3, 4

  4. #4
    Senior Member
    Join Date
    Dec 2005
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    107

    Default

    Thanks guys. Im looking at GEAR. PRNDL is not supported. Ill see if I can figure out how to get it supported so I can check it.

    Is there a wiring diagram anywhere on the site that you guys know of so I can check how I wired my trans to my ECU?

    Glenn

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