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Gear ratio????

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 55Willy, Nov 1, 2001.

  1. 55Willy

    55Willy 3/4 ton status

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    I pulled the cover on the 14 FF and heres the numbers:
    2 GM 3992484 11 41 9 77
    is it 41 / 9 for 4.56's ?
    or 41 / 11 for 3.73's ?

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  2. Esteban86K5

    Esteban86K5 1/2 ton status

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    I think it's 77 / 9 for 8.56's [​IMG]

    <font color=blue>It's easier to teach a child than to fix an adult.</font color=blue>

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  3. BurbinOR

    BurbinOR 3/4 ton status

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    I *think* its 41/11 for 3.73's, manufactured in 9 (Sept) of '77.

    Mine was much like that on my Dana 60 ring gear..........mine was built in '78..............[​IMG].

    <font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.rockcrawler.com>www.blazzinor.rockcrawler.com</a>
     
  4. Skigirl

    Skigirl 1/2 ton status

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    3.73's Jeremy. Trade ya for the 3.08's I found on mine :(
     
  5. txbartman

    txbartman 1/2 ton status

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    Yes, as another confirmation, its 41/11 or 3.73

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  6. 55Willy

    55Willy 3/4 ton status

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    So what kinda tires am I looking at running, I have a sm465?

    <font color=red>Life is like a mud hole:</font color=red><font color=blue>
    When the S#!T gets deep, you have to keep moving and friends can always pull you out</font color=blue>
    55 Willy's
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Jeremy...I run 36's with 3.73's and a SM 465. It's not that bad, a hair 'tall' for the street but it wheel's just fine. My cruise RPM is about 2500 (70 mph)on the freeway.

    Rene

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  8. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    And I thought everyone said you were short [​IMG]

    Just messing with ya [​IMG].

    Anyways by "tall" are you talking tires or gears. I assume gears and that RPM's are a little to high for the street. In that case just get a "tall"er lift and "tall"er tires and rpms with drop [​IMG].

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  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Well 4.10's would be perfect for the 36's and the 4 speed. No sense in makin the swap from 3.73's though.

    Anyways by "tall" are you talking tires or gears.

    The gears are a bit tall for the tire size. With a better clutch I'd prolly not notice as much but my clutch chatters a bit. Personally I think the cruise rpm on the freeway is close to ideal.

    Rene

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