Thread: Gear ratio

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  1. #1 Gear ratio 
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    Has anyone changed the transmission gear ratio on a 2007 transmission?? Will I be able to program it in fine with the 07 pcm with HPT??
    2017 Buick Regal 2.0 Turbo (SOLD 2007 Grand Prix GT. Front and rear PLOGs, 1.8 roller rockers, CAI, HPTuned, 3.4 pulley, TEP transmission, 90# springs, rollmaster single chain, Impala front brakes d/s rotors.) Past (Pontiacs) Grand Prix- 97 GT, 03 GT, 04 GT, 04 Comp G, 78 Trans am, 92 Trans Am.
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  2. #2 Re: Gear ratio 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    It can be done.

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  3. #3 Re: Gear ratio 
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    Ok thanks. You wouldn't happen to know of any links that show this procedure? Dave is getting ready to build my transmission and wants to know what gear ratio I want.. What ratio would you recommend. Would 3.69 be good or should I go lower 3.29 or stock?
    2017 Buick Regal 2.0 Turbo (SOLD 2007 Grand Prix GT. Front and rear PLOGs, 1.8 roller rockers, CAI, HPTuned, 3.4 pulley, TEP transmission, 90# springs, rollmaster single chain, Impala front brakes d/s rotors.) Past (Pontiacs) Grand Prix- 97 GT, 03 GT, 04 GT, 04 Comp G, 78 Trans am, 92 Trans Am.
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  4. #4 Re: Gear ratio 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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  5. #5 Re: Gear ratio 
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    Thanks for the help 5FDP!!

    I will get the 3.29s then
    Last edited by rickisrad; 07-25-2017 at 01:21 PM.
    2017 Buick Regal 2.0 Turbo (SOLD 2007 Grand Prix GT. Front and rear PLOGs, 1.8 roller rockers, CAI, HPTuned, 3.4 pulley, TEP transmission, 90# springs, rollmaster single chain, Impala front brakes d/s rotors.) Past (Pontiacs) Grand Prix- 97 GT, 03 GT, 04 GT, 04 Comp G, 78 Trans am, 92 Trans Am.
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