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Rear end gears?

This is a discussion on Rear end gears? within the Drivetrain forums, part of the LSx Technical Help Section category; I have a 98 LS1 Trans Am Conv. I believe that it came with 3:23 gears, is this correct? I ...

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    Member Jeff Jones's Avatar
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    Rear end gears?

    I have a 98 LS1 Trans Am Conv. I believe that it came with 3:23 gears, is this correct? I bought two sets of gears along with some other things from this guy. One set is 3:73 and the other set is 4:11's. If I have the 3:23's what would be the set of gears to try? Also what gears come on the WS6's?

    Thanks, Jeff

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    Senior Member Zboner's Avatar
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    are u auto or manual? thats first.

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    Senior Member Zboner's Avatar
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    look

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    Senior Member Zboner's Avatar
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    look on your RPO sticker on the door jam, if it reads GU5 then it has 3.23's and if its GU6 then its 3.42's found on the 6 speed cars. and GU3 is 2.73 gears

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    Member Jeff Jones's Avatar
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    I will take a look, thanks for the great info. BTW its a A4 trans.

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    Senior Member Zboner's Avatar
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    well i can tell what gears u have without checking what RPM are you running at 70 mph??

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    Member Jeff Jones's Avatar
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    I believe its around 1500

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    Senior Member Zboner's Avatar
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    if its at 1,500 then you have the shitty 2.73 gears but check when u leave today

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    Senior Member Danger731's Avatar
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    GU6 wasn't an option for Auto's

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    Senior Member Zboner's Avatar
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    yea no shit. thats why I said for 6 speed cars

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    Senior Member ss~zoso~ss's Avatar
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    dam son, mellow out
    lol

    anyone want to buy some 3.42's off of me?

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    Senior Member Zboner's Avatar
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    yea i get tired of this shit when people do that

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    Member Jeff Jones's Avatar
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    I just looked, GU2? Is it in with all the other codes on the top sticker?

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    Senior Member Zboner's Avatar
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    hum, let me look that one up

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    Senior Member Zboner's Avatar
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    oh shit my bad i ment GU2 insted of GU3 yes it is the 2.73 gears.

    here is the list of GM RPO codes man if u want to decode your options on the car

    http://www.c2e.info/rpocodes/MODERNGMRPO.html

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    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
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    GU2=2.73's

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    Senior Member ss~zoso~ss's Avatar
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    thats the same site i'm on now, a bandwith killer, its only text but its like 11234 pages long

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    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
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    Gu1 : Axle Rear, 2.41 Ratio
    Gu2 : Axle Rear, 2.73 Ratio
    Gu4 : Axle Rear, 3.08 Ratio
    Gu5 : Axle Rear, 3.23 Ratio
    Gu6 : Axle Rear, 3.42 Ratio

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    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
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    back to the orj. question, go with the 3.73's the 4.11's would be like redline at cruzing speeds on the highway, you'll probably be around 2.5-3k at 70 with the 3.73's in there just a guess

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    Senior Member Zboner's Avatar
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    im almost positive that the gu4 is the vett gears

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