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Final drive ratio?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 2Dogs, May 4, 2001.

  1. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Hello All, (If this site is truly back online)
    I need the gear ratio for 4th/OD on my 91 K5. It has the 700R4 (4l60) auto. Thanks -Dave
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    .70

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  3. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    Dave
    Hit the specs page, it has all that info. Just click on the "Trail Map" and you can jump right to it.

    Steve
    [​IMG]
    Mall-Running poseur 4x4 with curb-feelers
     
  4. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Thanks
     
  5. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    I see the first gear ratio but I must be missing 4/OD.... I am looking at the specifications page for
    the 91.
    My question is what will be my freeway RPM with 4.10 gears and 35"tires?
    NP241 is 2.72:1 so all I need is 4th....
    I use the blazer as a weekend toy hauler also so am curious about freeway speeds/RPMs. With the 32" tires
    and 3.08 gears I have now, I need to be doin about 90 before I can shift into OD. :) Dave
     
  6. 2Dogs

    2Dogs 1/2 ton status Premium Member

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  7. dyeager535

    dyeager535 1 ton status Premium Member

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    yes.... .70, 1, and your axle ratio will give you final drive.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    OK, 65 MPH on the freeway, 4.10's in OD (0.70 to 1) Assuming a true tire diameter of 34.5" your new freeway RPM will be about 1816 RPM. Same combo in Drive 2595 RPM.

    Hope that helps.

    BTW welcome to CK5! [​IMG]

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     

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