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WHEELS....

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ksogn, Feb 13, 2001.

  1. ksogn

    ksogn Registered Member

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    Location:
    norway, oslo
    HI I HAVE A 77MOD K5 BLAZER WITH A 350 IN IT.

    TODAY I HAVE 31" WHEELS,,,, IF I PUT 35" WHEELS ON IT WILL THE CAR USE MUTCH MORE TIME TO GET INN SPEED??

    SORRY FOR MY BAD ENGLISH HOPE YOU UNDERSTAND ME..

    :)
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Do you know what gear ratio you have in your differentials? That will be important to know before installing 35-inch tall tires. If you have a 3.08 gear ratio, then you will notice very poor acceleration with 35-inch tires. If you have a 3.73 rear ratio, then the performance won't be as bad, but will be less than with your 31-inch tires.

    A 4.10 gear ratio would be good with those tires and your transmission. ( '77 should have a Turbo 350 transmission). However, changing the gear sets in both differentials may be very expensive in your country. Let us know what gear ratio you have and we can provide more help.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  3. Espen88k5

    Espen88k5 1/2 ton status

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    For a gasoline engine the diffrence will be felt more in the steering and braking, than in the axceleration.

    You should also start to worry about your rear axle when you go to 35"'s. It's easy to break a "stikk aksel" if you go spinning from ice and suddenly hit asphalt with 35". But people do it all the time, so just fix it when it breaks.


    <A target="_blank" HREF=http://www.espen88k5.coloradok5.com>http://www.espen88k5.coloradok5.com</A>
     
  4. ksogn

    ksogn Registered Member

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    how do i figure out my gear ratio,,,,,, OK (i now i am stupid) but thats why i am asking you guys!

    maybe i shod go for 33 insted..? hmmm hmmm hmmm.....:)

    sorry for my bad english

    :)
     
  5. HarryH3

    HarryH3 1 ton status Author

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    There should be a white sticker with a blue border inside the glove box. On it you'll find many 3-letter codes. These are called "RPO" (Regular Production Option) Codes and are used by GM to track which options are installed in each vehicle. The axle ratio codes begin with the letter "G". Post those codes and we can then determine what your gear ratio is (assuming the gears have not been changed since your K5 was built).

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  6. ksogn

    ksogn Registered Member

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    its nothing inside my glove box.....
    its not been changed after it was build.

    is it any other way to find it out....
    thanks for the help so far..

    sorry for my bad english

    :)
     

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