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Thread: is a 3.73 too much

  1. #16
    Full Throttle Extreme! pontiacfreak142's Avatar
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    just a some helpful advice though, personally i would get the converter in the car, then have it dynoed to see where the power band is with your mods. I made the mistake of not doing this and went with 3.73's, but i just had the car on the dyno recently and found out my peak power is at about 6k rpm, my car shifts at 6200 and im only goin through the traps at just over 5k, so know i have to get 4.10's lol.
    1996 pontiac firebird 3.8 - 13.6 @ 98
    2000 pontiac bonneville 3.8 - 16.79 @ 84
    1995 olds 88 3.8 - no times yet

    No i am not obsessed with 3800's

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  3. #17
    Full Throttle Extreme! FloydSummerOf68's Avatar
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    Quote Originally Posted by xmetallicaxguitaristx View Post
    I'm pretty sure my car stalls up to like 2800 easily. It's been to 3000 with 24 psi in the back tires on a drag strip.

    Why waste money on a stall if you are barely going to raise the stall?

    I also have 4.10's and they are just right IMO for daily driving. Well I never use the highway. If I did, I definitely wouldn't get 4.10's. lol
    If your car will brake stall to 3000 rpms then something is wrong with it.

    Also, raising the rpms is not the only benefit to torque converter.
    Shawn
    '11 CTS-V Coupe
    '12 SRT8 Charger
    V6 Firebird - 12.2 on 100 shot and 13.5 Cam only - GONE

  4. #18
    Light Throttle 1320smokeshow's Avatar
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    wow...i feel like an outcast...we still have the OE 3.23's....i'm afraid of shifting 4th though...i really don't wanna have to push the revs in 3rd....
    There are no V6 f-bodies here in Afghanistan
    N2OEQIP's Mechanic-1997 3800 V6 camaro
    Oct-2008 [email protected] w/451rwhp
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  5. #19
    $.02 Queen OneSlowL36's Avatar
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    Quote Originally Posted by FloydSummerOf68 View Post
    If your car will brake stall to 3000 rpms then something is wrong with it.

    Also, raising the rpms is not the only benefit to torque converter.
    Damn, I can stall mine up to 2800 as well. But it doesn't launch very hard since its probably a stock one so the STR isn't optimal for performance.
    ~Ryan~

    A4, Z28 Catback, 3" Magnaflow cat, 3" Cutout, PCMforLess tune, 3.42 Z/T
    As of now, its a 3350 lb paperweight.

  6. #20
    Half Throttle Mark42's Avatar
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    I have a 3.08 open rear. Car accelerates poorly because its always way too low in the RPM rage to be making any HP.

    So, I spent the last three months reading everything I can about gears and what people say about them. My decision is to go with 3.73's in my Firebird because its a good jump from 3.08 (about 21% jump in RPM), will still let me cruise the highway without screaming the motor and will not kill the gas economy.

    I also decided that money invested in a LSD and gears will give me more of a performance improvement than anything else I could buy for the same money.

    The PCM will need a tune for the speedo, and a few extra tweeks can be thrown in to boot, IE more higher shift points, removed speed limit, and a little richer at WOT.

    So unless you are racing, it seems that the 3.73 is the all around best of both worlds: acceleration and economy.

    1998 Firebird Coupe
    Mods: 3.73 Gears, Eaton TrueTrac, PCM Tune, Aluminum Drive Shaft, Cold Air Intake, 180 Thermostat, Magnaflow Cat-back exhaust.

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  7. #21
    $.02 Queen OneSlowL36's Avatar
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    I don't think anyone is unhappy with 3.73s. Some say 4.10s are bearable daily as well, but don't quote just me on that.
    ~Ryan~

    A4, Z28 Catback, 3" Magnaflow cat, 3" Cutout, PCMforLess tune, 3.42 Z/T
    As of now, its a 3350 lb paperweight.

  8. #22
    Half Throttle DrkKght03's Avatar
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    Got 3.73s in mine, and love them. But it really is all in what you want to do with the car.

  9. #23
    Half Throttle Mark42's Avatar
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    FYI, Chevy replace two 3.8's in my 96 Camaro under warranty due to high rpm shifting with the 5 speed. They never questioned the issue, but both times the big end bearings spun.

    So now that I have a 3.8 and automatic, when I send the PCM off for reprogram, I will ensure that the shift point is not past 5800 or 5900 tops.

    Just a little piece of mind now that the car has no warranty.

    1998 Firebird Coupe
    Mods: 3.73 Gears, Eaton TrueTrac, PCM Tune, Aluminum Drive Shaft, Cold Air Intake, 180 Thermostat, Magnaflow Cat-back exhaust.

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  10. #24
    Half Throttle Mark42's Avatar
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    r

    Quote Originally Posted by DrkKght03 View Post
    Got 3.73s in mine, and love them. But it really is all in what you want to do with the car.
    How do you use your car?
    How would you describe the performance improvement over the the original 3.xx gears?
    How has it affected your fuel economy? What is your new mpg?

    I know those are very specific questions, but your answers will be a big asset to those of us planning on using 3.73's

    Thanks,

    Mark.

    1998 Firebird Coupe
    Mods: 3.73 Gears, Eaton TrueTrac, PCM Tune, Aluminum Drive Shaft, Cold Air Intake, 180 Thermostat, Magnaflow Cat-back exhaust.

    My Firebird Projects
    : Click Here


  11. #25
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    IMO I would keep the wheels it is in. I have 3.42s and it works fine for my application and my mods. 3.73s are good if you want to have bigger slicks though.
    Last edited by Leonard 3.8L; 11-30-2009 at 10:36 AM.

  12. #26
    Contributing Sponsor LETZRIDE's Avatar
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    Quote Originally Posted by FloydSummerOf68 View Post
    If your car will brake stall to 3000 rpms then something is wrong with it.

    Also, raising the rpms is not the only benefit to torque converter.
    you beat me to it...being able to launch higher is only half the benefit of going to a larger stall...Tq multiplication and shift extension are the other 50%

  13. #27
    Full Throttle Extreme! 99v6cam's Avatar
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    4.10s Go! I and many others have had them and love em, and I'm confident that you will too.
    Corey-Former Southeast Mod
    BLK '14 Camaro 2SS/RS M6
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  14. #28
    Half Throttle Mark42's Avatar
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    Quote Originally Posted by 99v6cam View Post
    4.10s Go! I and many others have had them and love em, and I'm confident that you will too.
    Why?

    1998 Firebird Coupe
    Mods: 3.73 Gears, Eaton TrueTrac, PCM Tune, Aluminum Drive Shaft, Cold Air Intake, 180 Thermostat, Magnaflow Cat-back exhaust.

    My Firebird Projects
    : Click Here


  15. #29
    Full Throttle Extreme! 99v6cam's Avatar
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    Quote Originally Posted by Mark42 View Post
    Why?
    It's one of the few mods that is quick with extremely noticeable gains for a relatively low price (very low price if you install it yourself but it's not something just anyone can do). It improves city gas mileage (as long as you dont drive like you stole it because that has a lot to do with it) and I most of the 65mph 70mph highways that are around where I live I didn't notice any gas mileage loss. One of my favorite mods (other than the cam) that I did to my camaro and unless you have plans for boost I recommend it to everyone. And if you have an open differential and replace it with a limited slip with 4.10 gears on top of that, you'll get the rare combination of better acceleration and better traction with a single mod.
    Corey-Former Southeast Mod
    BLK '14 Camaro 2SS/RS M6
    USM '07 Cobalt LS I4 M5 : SLOW SOLD
    SSM '99 Camaro V6 M5 E/T:14.8 @ 94 (before cam) SOLD

  16. #30
    Full Throttle Extreme! FloydSummerOf68's Avatar
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    I agree....do it right and do 4.10s unless you have to do long 75mph drives every day.
    Shawn
    '11 CTS-V Coupe
    '12 SRT8 Charger
    V6 Firebird - 12.2 on 100 shot and 13.5 Cam only - GONE

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