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  1. #1

    Default 4L80E trans test port

    hi guys i have a 1999 GMC K3500 t ton with a 4L80E tranny and want to put a trans temp gauge on it and am wondering whar the pressure test port is on a 4l80E thanks or the help

  2. #2

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    i foind it the test port is just above the shifter on the drivers side on the tranny just like my old 4L60E had thanks tho

  3. #3
    Legend unplugged's Avatar
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    If you have time, could you take some pics of the job and post them in the how to section with a short write up? Thanks for sharing the info.
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