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Gears: Which do you think are the best?

Discussion in 'Driveline' started by SVTVenom, Oct 24, 2002.

Which Gears Do You Think Are The Best?

  1. Stock - 3.55

    221 vote(s)
    27.7%
  2. 3.73

    193 vote(s)
    24.2%
  3. 3.90

    137 vote(s)
    17.2%
  4. 4.10

    217 vote(s)
    27.2%
  5. other - please list

    31 vote(s)
    3.9%
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  1. SVTVenom

    SVTVenom HOOK'EM HORNS! Established Member

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    Which gears do you think would benefit the Cobra the most that will see very light track duty and will be more of street brawler? ;-)
     
    Last edited: Oct 24, 2002
  2. hwystr

    hwystr New Member Established Member

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    I've seen a few studies on this, that recommend staying away from integer ratios, 4.10 and 3.90 are close to 4.0, and in some cases you will get excessive driveline vibration/sound as the 4th order tire vibration will be additive to 1st order driveshaft vibrations. Similar for 3.08's. If you do a search, you'll see alot of 4.10 and 3.08 axle noise complaints. 3.73's and 4.30's have better integer separation. But I doubt 3.73's will be much different than 3.55's - that's only ~5% change - not worth $.

    :read:
     
  3. Rwick7

    Rwick7 Active Member Established Member

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    Hwystr - that is the craziest thing I've ever heard...where is more info on this...it makes no sense to me at all. I would say 4.10's would be the best street/track gear for these cars.
     
  4. hwystr

    hwystr New Member Established Member

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    Crazy - No. A pain to deal with - yes.

    Go to stangnet and search the product revies for axle ratio comments. You'll see the 3.08 and 4.10's tend to have "driveline" droans/periods that are magically fixed when they go to 3.73's. Won't happen in every car to the same degree, but you take your chances. Put on some 4.10's, dump the axle damper, great for performance, but not for driveline droan/periods.
     
  5. SVTVenom

    SVTVenom HOOK'EM HORNS! Established Member

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    Gears are not supposed to moan/whine at all. If they do, then they have been improperly set up. The driveline vibe is usually due to driveshaft indexing problems. You can either have it indexed or just get a carbon fiber driveshaft and not worry about anything.
     
  6. djax

    djax New Member Established Member

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    Aug 23, 2002
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    So Cal
  7. Sailing2Smth

    Sailing2Smth Smooth Ass Sailor Established Member

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    agreed
     
  8. matstang03

    matstang03 New Member Established Member

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    I have 4.10 gears in my 03. I have no noise at all. I love what they didfor my car. So far that is prob the best thing i could have done for my car. It is amazing the difference 4.10 makes in ths car. For the street these gears are awesome. i were to line up w/ an 03 that has the same mods as me, on stock gears, and we were going from a roll, i would instantly pull at least 2 cars on him. i am so happy w/ these 4.10's. If you are going to do a gear swap, 4.10 is the way to go
    Matt
     
  9. david smilovic

    david smilovic New Member Established Member

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    Aug 14, 2002
    Location:
    Paradise Valley
    I installed 4:10's no complaints here.It may not be the best car for a 8+ hour trip but it smokes out of the hole with zero boost.
    Cant wait till late Nov. early Dec,then Sean (SHM) and I will do all the final grunt stuff to get ready for an experimetal ATI good for 30 lbs. boost and maybe some giggle juice at 2600-4200 rpm then that big boy kicks in and it will be SWEET!! Dave S.
     
  10. Got Incon?

    Got Incon? Government Slave Established Member

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    Columbia MD
    On my turbo car, I have 3.55's, and on the street any gear below third is useless. As soon as I get around to it I am going to swap in some 3.27's or something. I have such a broad torque curve it pays to not take the time to shift and ride it out longer in first and second (which I would spin through anyway). I imagine the cobras are the same after you add some more torque.
     
  11. Hammer

    Hammer New Member Established Member

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    Location:
    Waretown, NJ
    Like Matt said, 4.10's are AWESOME on the street. From a roll, your car will pull with sheer neck-snapping acceleration.

    But at the track, they will only be effective with tires - tires that are taller than stock. There is NO WAY to keep the stock tires glued with 4.10's.

    And only gears that are improperly installed make noise. It's a common thing because proper installation of ring and pinion requires lots of expensive specialty tools and lots of experience with gear swaps.

    For the NJ/PA boys, I recommend Crazy Horse Racing for the task. Their gear installs are second to none and Matt can attest to that.

    :beer:
     
  12. 03SoCalCobra

    03SoCalCobra HIGH PSI 03 Established Member

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    Huntington Beach, CA (h), Culver City (w)
    No offense intended, but I think you're high. The gear ratio is the difference between the pinion head and the ring gear. Tire diameter can vary quite a bit depending on tire size, aspect ratio, rim size, etc.. AND the gear, pinion, differential, half shafts, drive shaft and rim all have different harmonics, not to mention that the rim is circled by a giant donut of RUBBER.
     
  13. ALLNTRL

    ALLNTRL Active Member Established Member

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    Once again I vote for the 3.90's! :D
     
  14. Peter

    Peter New Member Established Member

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    Oct 23, 2002
    Location:
    Long Island NewYork
    4.10's



    96 Cobra
    Vortech S-trim(10 lbs)
    Andersen power pipe
    BBK long tubes
    Pro-m 80
    MSD-4 ignition
    Aluminum driveshaft
    42lb injectors
    = 473 rwhp
     
  15. Dana

    Dana Bluesmobile Established Member

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    As an aside to this, which brand of gears is everyone using? I have read here and other places that FRP gears are the only way to go. I really don't have any experience with all the brands out there. I know that there are many brands available, but I only want to do this mod once.
    I initially wanted to go with 4.10's but if FRP starts making 3.90's, I'll probably go with that, but that is way down the list of future mods.
    I also remember reading a post where someone was kind enough to list the top speeds with various gears, but I can't seem to find it. This would be useful for setting the gearing for the 1/4 mile. Anyone know where I can find this info?

    Thanks,
    Dana
     
  16. 2F2F

    2F2F [2 F]ast [2 F]urious Established Member

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    3.73. Seems like a conservative choice.
     
  17. TTAFB_SVT

    TTAFB_SVT BETHA'S BACK !!!!!!! Established Member

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    Aug 27, 2001
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    Pennsylvania
    Go with FRPP. Motive gears,3:90 or otherwise,will whine like a lost kid.
     
  18. Blue03Cobra

    Blue03Cobra The Family Dinner Improv Established Member

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    4.10s if you want a "street brawler"...
     
  19. §ilver§nake

    §ilver§nake Quiet Thunder Established Member

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    Madison, Alabama
    I am considering this mod. What compensator do you have for the speedometer?
     
  20. L.B.

    L.B. el rey Established Member

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    Jun 21, 2003
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    Orange County
    4.10S ;-)
     
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