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  1. #1

    Default Another question about gears

    Have an 02 z71

    1900 RPM at 70mph

    285/75r16 setup (32.8" tire)

    Do I still have the stock 3.73's in there?

    Sorry if its been answered before, did a few searches.

  2. #2
    Jr. Apprentice wackoaboutgm's Avatar
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    Jul 2012
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    Default

    Look on the inside of your glove box for the code list. If you have the GT4 code , its got 3.73 gears.

    - - - Updated - - -

    Look on the inside of your glove box for the code list. If you have the GT4 code , its got 3.73 gears.
    AL-
    2003 SILVERADO 2500 HD
    2001 SILVERADO 1500 Z71

  3. #3

    Default

    I know the codes, wanted to know what RPMs people have with bigger tires/gears.

    And, if 1900RPM tells me that the previous owner left the gears stock after the lift and tires.

  4. #4

    Default

    Quote Originally Posted by kinson33 View Post
    Have an 02 z71

    1900 RPM at 70mph

    285/75r16 setup (32.8" tire)

    Do I still have the stock 3.73's in there?
    Yes, you do.

    Quote Originally Posted by kinson33 View Post
    I know the codes, wanted to know what RPMs people have with bigger tires/gears.
    I have aftermarket 4.56 gears and am running 34.3" tires. I run ~2300rpm's at 70. With my short gears 70mph is just outside my sweet spot. 50-65 is where my best mpg is with these gears and tires.

  5. #5

    Default

    Quote Originally Posted by SurrealOne View Post
    Yes, you do.



    I have aftermarket 4.56 gears and am running 34.3" tires. I run ~2300rpm's at 70. With my short gears 70mph is just outside my sweet spot. 50-65 is where my best mpg is with these gears and tires.
    Thank you.

    Any reccomendations on places to buy r&p sets? Summit always seems reasonable in price.

  6. #6

    Default

    You could also check East Coast Gear Supply. They happen to be local to me so I bought from them AND had them do the installation work since gear patterning isn't a skill I possess. I'm running Nitro gears based on the recommendation from ECGS. When I mentioned Yukon gears they had some not-so-good things to say about them.

    As these guys do gear work regularly AND they warrant their work for 5 years, I believe they made their recommendation and comments based on solid experience. They were willing to put in any gears I wanted, by the way. (i.e. They pushed nothing on/at me and merely recommended a manufacturer based on my diff and the ratio I wanted.)

    I dealt with Chase when there. I originally thought he was just a knowlegdeable sales person but it turned out he's the owner. It was refreshing to see an owner present in his shop. He drives a lifted Cherokee that rolls on 37's -- some insane work to push those puppies, so he's an enthusiast, too.

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