Thread: Anyone run 3.05 gearing (Buick)?

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  1. #1 Anyone run 3.05 gearing (Buick)? 
    Donating Users Lawngoose's Avatar
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    I got a replacement tranny installed, and before install we looked at the tag on it. It came from a Regal LS, and from the documentation we found online shows it has 3.05 gearing compared to my old GTP 2.93 gearing.

    My question is this... Anyone hear run that gearing? If so, did you update the tranny tables?

    I am not throwing a incorrect gear ration code, but sometimes on cruise it feels like its shifting too firm.... hence the question.
    02 GTP 13.6 @ 100mph - SOLD
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  2. #2 Re: Anyone run 3.05 gearing (Buick)? 
    The mod from over yonder TheOtherNick's Avatar
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    for any gear change you need to update the pcm.
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
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  3. #3 Re: Anyone run 3.05 gearing (Buick)? 
    Turbo is the way to go. BillBoost37's Avatar
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    I have an LS that came wtih 3.05, so no .. it didnt' need to be updated.

    Like mentioned..you changed gear ratios and the pcm is asking you dude?

    You need to get the change programmed.
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  4. #4 Re: Anyone run 3.05 gearing (Buick)? 
    Donating Users Lawngoose's Avatar
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    I was looking for someone who has done it.... The only settings I see with my PT is

    Tranny>Gear Ratio>

    Calculated_Pulses_Per_Revolution
    Pulses_Per_Mile
    Drive_Sprocket_Ration

    Just wanted to get the input of someone that has done this before...
    02 GTP 13.6 @ 100mph - SOLD
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