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4L65e Level lll won't shift at WOT

This is a discussion on 4L65e Level lll won't shift at WOT within the Automatic Transmission forums, part of the Drivetrain category; Hello guys. New to the forum today. have a problem with my hot rod. Just completed a total restoration of ...

  1. #1
    Junior Member
    Join Date
    Jan 2012
    Location
    San Diego
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    Red / white
    1955 Chevy Bel Air - LS1

    4L65e Level lll won't shift at WOT

    Hello guys.
    New to the forum today.
    have a problem with my hot rod. Just completed a total restoration of a 55 Chevy post. Using Paul Newman chassis and LS1 / 4L65e Level lll trans from Gearstar. Problem is, it won't shift at WOT. 78 miles on the odometer since I finished it, but the engine is out of a Camaro that rolled, and it has 18K on it. I thought it was a 2002 Camaro, but my on board computer calls it a 98 (??). Used a SNAP ON diagnostic to find out the resistance for the transmission does not drop adequately (1.05 down to 0.8....but not to or below 0.1 as required I'm told). Shop does not know what to change and neither do I.

    Any ideas would be very much appreciated.
    Ron in San Diego

  2. #2
    Junior Member
    Join Date
    Jun 2008
    Location
    Butler mo
    Posts
    76

    Blue
    98 Trans Am

    when i changed the gears in my 98 t/a it would'nt shift at wot so i changed the shift points and it took car of it. hope it helps but thats all i could think of good luck

  3. #3
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
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    22,520

    98 Formula
    06 duramax

    what are you using to control the trans with? I don't know about the aftermarket controllers but I know with the stock pcm the tranny has to meet 2 criteria in order for the shift to happen....rpm and mph. If it doesn't meet both of those it won't shift.

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