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How to tell what gears?

This is a discussion on How to tell what gears? within the Drivetrain forums, part of the LSx Technical Help Section category; Im looking at buying a 2000 Z28 A4. I want to know what gears it has either 2.73s or 3.23s? ...

  1. #1
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    How to tell what gears?

    Im looking at buying a 2000 Z28 A4. I want to know what gears it has either 2.73s or 3.23s? how can you tell? Do the majority of autos have 2.73 or 3.23?

    Thanks

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    RPO GU2 - 2.73's
    RPO GU5 - 3.23's

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    Exalted Cyclops 67CamaroRSSS's Avatar
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    2002 Z28 A4 NBM
    Sadly now demodded :(

    Also: Steel driveshaft = 2.73's; Aluminum driveshaft = 3.23's.

    By now you never know though. My door sticker sez GU2 (and that's what it was when I bought it) but I now have 3.73's and an aluminum ds.

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    Member fergyflyer's Avatar
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    Quote Originally Posted by 67CamaroRSSS View Post
    Also: Steel driveshaft = 2.73's; Aluminum driveshaft = 3.23's.

    By now you never know though. My door sticker sez GU2 (and that's what it was when I bought it) but I now have 3.73's and an aluminum ds.
    Why the change to an aluminum driveshaft???

    I'm just getting ready to change gears and now would be the right time. Thanks.

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    Member cmb570's Avatar
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    did SS models use same gear throughout run, same with z28's.
    do ss modes use the RPO GU5 - 3.23's , or is it all mix and match and check my code ?

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by fergyflyer View Post
    Why the change to an aluminum driveshaft???
    I think the better question is 'Why not?'

    Lighter, pretty damn durable unless you are cutting 1.6xx or better at the track.

  7. #7
    Exalted Cyclops 67CamaroRSSS's Avatar
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    2002 Z28 A4 NBM
    Sadly now demodded :(

    Quote Originally Posted by cmb570 View Post
    did ss models use same gear throughout run, same with z28's.
    Do ss modes use the rpo gu5 - 3.23's , or is it all mix and match and check my code ?
    A4 SS = 3.23; M6 SS = 3.42....

    Dealer models (HotRod, Dale Earnhart, GMMG, etc), OTOH, generally used 3.73 for A4 and 4.10 for M6.
    Last edited by 67CamaroRSSS; 07-14-2009 at 08:47 PM.

  8. #8
    Exalted Cyclops 67CamaroRSSS's Avatar
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    2002 Z28 A4 NBM
    Sadly now demodded :(

    Quote Originally Posted by fergyflyer View Post
    Why the change to an aluminum driveshaft???

    I'm just getting ready to change gears and now would be the right time. Thanks.
    See "Mr. Lous's" post above. I'd go with a carbon fiber driveshaft if I could justify the cost.

    Remember: Reduced rotating mass = faster ET....

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