GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 3 of 3

Thread: Rear-end gears

  1. #1

    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?

  2. #2

    Default

    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 200K miles
    2005 Saturn ION-2 Stock 277K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half



    There are 10 kinds of people, those who understand binary, and those who dont...

    Remember kids, the only difference between screwing around and science is writing it down- Adam Savage

  3. #3

    Default

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

    Thanks

Similar Threads

  1. what rear diff gears should i put
    By 4.8chevysilverado07 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 2
    Last: 01-10-2010, 12:43 PM
  2. 3.73 Gears
    By Restlessone in forum GM Powertrain
    Replies: 10
    Last: 08-31-2009, 01:40 PM
  3. Rear End Gears
    By matzner66 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 3
    Last: 03-21-2009, 09:50 AM
  4. Can I drop 3.08 gears in a 1998 2wd Suburban-3.4 gears?
    By phoebeisis in forum GM Powertrain
    Replies: 6
    Last: 12-14-2007, 11:12 AM
  5. 4.10 Gears
    By D13TRY1N6 in forum Performance & Fuel
    Replies: 4
    Last: 10-19-2007, 08:16 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •