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  1. 04-18-2008, 09:19 AM #1
    joeray007
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    Default Rear-end gears

    Just a thought...

    Does anyone know what gears are in my 99 'burb?

    Specs:
    C1500, Stock 350 CID, SLT


    Is it 3.42's?
    Is it posi-traction (I don't think so)

    Would it be better to get posi and if so, 3.42 or 3.73?
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  2. 04-18-2008, 10:40 AM #2
    Crawdaddy
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    If you look at the RPO codes in the glovebox, one of them is for the rear end gear ratio.

    I'm not 100% this list is good enough for truck RPOS, but here's a list. It looks like the RPO code you're looking for starts with a G

    [media]http://www.marshu.com/images-website/car/gm-firebird-camaro-rpo-car-door-manufacturer-codes/gm-firebird-camaro-GM-RPO-car-codes.pdf[/media]
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 194K miles
    2005 Saturn ION-2 Stock 200K miles (In 6 years...ouch)
    1982 Bronco, 1993 Bronco, 1971 M35A2 Deuce and a Half



    There are 10 kinds of people, those who understand binary, and those who dont...
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  3. 04-21-2008, 11:19 PM #3
    joeray007
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    Default

    If you pdf is correct, then I have 3.42 positraction limited slip rear.

    Thanks
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