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Thread: lazy shift from 3-4,4-5,5-6

  1. #1
    New Member
    Join Date
    Feb 2011
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    5

    Default lazy shift from 3-4,4-5,5-6

    hi i'm new to efi and been doing some reading and writing my own program and have a problem. was wondering if i could get some help. I made a tune that i like but it made the trany in top gears shift real lazy. long shifts and i can't figure whats causing it. does the trany dtune when it shifts like open vanes etc. my tune changed triming. I increased turbo vanes on all altitudes. I increase it alot at low throttle for braking but i cant figure what causes trany to shift like that. please help thanks

  2. #2
    Senior Member
    Join Date
    Dec 2010
    Posts
    121

    Default

    Could be the allison adaptive shift logic kicking in. basically it learns how you drive and the added horse might be putting added strain on the allison, causing it to shift longer. You can tune the tranny, but you will have to ask someone else in the EFI forum. I haven't explored that section yet

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