View Poll Results: Gear's Poll

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  • 3.73

    102 86.44%
  • 4.10

    16 13.56%
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Which Gears

This is a discussion on Which Gears within the Automatic Transmission forums, part of the Drivetrain category; THANK GOD!!!!..but i should still switch to 3.73..i'm just not sure if i'm gear head ready enough to change it ...

  1. #21
    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    THANK GOD!!!!..but i should still switch to 3.73..i'm just not sure if i'm gear head ready enough to change it yet
    mods- suncoast creations hood with functional lt1 style airbox, ls6 intake, QTP longtube headers, QTP ORY, UMI SFC, Adj. LCA with relo brackets, UMI adj. panhard bar, Koni SA and strano springs,Torq Thrust M 17s 9.5 and 10.5 with nitto 555Rs, tuned by Frost
    Quote Originally Posted by Modulistic View Post
    sometimes you get owned, sometimes you own.

  2. #22
    car enthusiast djvaly's Avatar
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    I have '99 TA A4, so do I have the 2.73 or 3.23 as stock? would it be in the
    user's manual? I doubt it.. please help

  3. #23
    car enthusiast djvaly's Avatar
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    never mind, I found the answer on a different thread but wanted to share with you anyways.
    look at the service parts specification sticker on the door,
    "Look at the RPO codes (on the side of the door jamb, or in the glovebox). If you see GU5 that's a 3.23 car and a 3 series carrier. If you see GU2 it is a 2.73 car and a 2 series carrier."

    I have a GU5 = 3.23 gear, so I will go with 3.73... any ideas on 1/4 mi time gain? .1, .2?

  4. #24
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    White
    1998 trans am

    I have 2.73 would I notice a big difference switching to 3.73 ...in the 0-60 quarter?

  5. #25
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    1998 trans am

    ..what is the series carrier?

  6. #26
    car enthusiast djvaly's Avatar
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    for a 3.x gear the series carrier is 3. for 2.x it is 2.

  7. #27
    98z28 hiramsuito's Avatar
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    former bright green
    98 z28

    I want to switch from 2.73 to 3.73 but I've heard that I need some kind of adapter or spacer, is it right?.

    In case of needing it, would you guys please recommend me any good brand?

  8. #28
    Nitrous Tuner LS2Tuner's Avatar
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    3.91's

    Quote Originally Posted by mattycakes98TA View Post
    ..what is the series carrier?
    That is refering to what gear the carrier was originally equiped with........Different thickness ring gears depending on "series carrier".
    Now there is SOO MANY manufactures you can get a spacer for the thin gear if needed for your carrier.


    3.91's ALL THE WAY!!!!
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  9. #29
    car enthusiast djvaly's Avatar
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    If I have this idea right, a torque converter (stall converter) provides additional torque multiplication equivalent to a higher numerical gear ratio..
    so if I were to do 3.73 gears why would I need to do 3000-3200 stall converter? would I do one or the other? please explain.. Thanks!

  10. #30
    Nitrous Tuner LS2Tuner's Avatar
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    The converter NEEDS to match the cam.........If the cam doesn't start tp make power until 3000rpm a stockl con. that locks up at 1400rpm isn,t going to let the motor "free wheel" to 3000 before it locks up........
    When you see a car at the stop light jumping around trying to roll forward while idleing thats because some dumbass has a tight ass stock con. on a big cam.
    Gears are only going to help it rpm faster not rev higher before it moves!!!! There fore if you have a stock cam anything over a 2000 isn't going to do shit!!!
    Stock cam change gears NOT converter!!!

  11. #31
    car enthusiast djvaly's Avatar
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    I see, so in other words. I'd do the 3.73 gears first, then get a mild cam and then put in the 3200 street fighter stall.. in that order?..

  12. #32
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by djvaly View Post
    I see, so in other words. I'd do the 3.73 gears first, then get a mild cam and then put in the 3200 street fighter stall.. in that order?..
    Yes but don't put a # on the stall until you match it with your cam choice!!!
    Also have you done anything in the area of making all he power you have now get to the ground......Such as sub frame connectors or spring changes.....?

  13. #33
    car enthusiast djvaly's Avatar
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    yep, i got the SFC's in .. and the eibach pro kit
    Last edited by djvaly; 11-09-2006 at 08:20 AM.

  14. #34
    LS1-TA schrysler's Avatar
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    would going from 273 to 373 be a pretty drastic difference?
    1998 Trans Am Vert, M6, Soon to be full of goodies......

  15. #35
    car enthusiast djvaly's Avatar
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    a nice change in acceleration I hear, you'd need to tune your car for the new gear, I recommend buying a handheld programmer like Hypertech Prog 3 or such. you get ok tuning out of that, shift points moving etc, plus the gear ratio part. your speedo needs that recalibraton tuning.

    PS. I also hear it's worth doing a mild torque converter/stall for the A4.. if u have it as a daily driver, if it's a track car only, then shoot go for 4.10 gear and a more aggressive stall convertor.
    Last edited by djvaly; 11-13-2006 at 08:35 PM.

  16. #36
    This Light Dinner Is Over hamburger68's Avatar
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    1998 Camaro Z28 A4

    Talking

    To offer a totally different approach:
    I'm gonna stick to my 2.73 gears (in fact i just had them replaced), 'cause i wanna see how fast this baby goes on the autobahn!
    I guess 170 - 180 mph isn't out of reach... Anyone of you tried that in an f-body yet? (And survived?)

  17. #37
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by schrysler View Post
    would going from 273 to 373 be a pretty drastic difference?
    Yes MAJOR change.

  18. #38
    sped
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    Where can you buy 3:73 gears from? I've been having a little trouble finding them. Also, you can't use a programmer on my 93 LT1, so what the heck would I do if I got new gears? Would I have to do anything?

  19. #39
    car enthusiast djvaly's Avatar
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    Quote Originally Posted by hamburger68 View Post
    To offer a totally different approach:
    I'm gonna stick to my 2.73 gears (in fact i just had them replaced), 'cause i wanna see how fast this baby goes on the autobahn!
    I guess 170 - 180 mph isn't out of reach... Anyone of you tried that in an f-body yet? (And survived?)
    you ain't getting 180mph, from LS1 that easily, I'd say 170 top more realisically.

  20. #40
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    Quote Originally Posted by djvaly View Post
    If I have this idea right, a torque converter (stall converter) provides additional torque multiplication equivalent to a higher numerical gear ratio..
    so if I were to do 3.73 gears why would I need to do 3000-3200 stall converter? would I do one or the other? please explain.. Thanks!
    Let me make this simple. Gears are great and all in torque amplification but your car makes more power at certain RPM ranges. HP is greater at higher RPM's what the converter is going to do is lockup at that certain stall speed that it was made for and transfer that power at higher RPM's to the wheels.

    Heres a analogy that I really like when you go outside jogging you start to breathe in and out faster and harder. Well the same thing goes for a performance engine. The engine is breathing in and out harder and faster, at a higher rpm. If a high performance engine makes power at a higher rpm, then a higher stall speed torque converter is what you need to put more power to the ground quicker.

    Personally I liked my 4.10's in conjunction with my PI 3000 stall. Couldnt catch traction worth a d*** but enjoyed it.

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