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Thread: 4L80e Wont Lock up at Commanded Lower speed

  1. 08-01-2019 #1
    Shortyno10
    Shortyno10 is offline
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    4L80e Wont Lock up at Commanded Lower speed

    2000 Silverado with 4l80e trans segmented. will only lock up in 4th which is what i have in the tune, but wont lock sooner than about 54mph. i am trying to get it to lock up at 44mph. maybe im missing a table thats over riding the apply and release table?? any help is greatly appreciated thanks.
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  2. 05-11-2022 #2
    DandersonGM
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    I am having this same issue but mine will not lock up until 56 mph. I know this thread is a couple years old. Did you ever get an answer?
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