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3.73 question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Seventy4Blazer, Feb 18, 2002.

  1. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    i have both a D44 and a 14FF that have 3.73 in them. i knowthat the carrier break for the D44 is 3.73 and for the 14FF is 4.11. if i get new carriers on the higher side i can put 5.13's in right?
    Grant

    1974 Chevy Blazer Cheyanne. but it is on 33's now, with saggy old springs. i am in Yuma Arizona if ya got any parts for me.
     
  2. txbartman

    txbartman 1/2 ton status

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    In a word... Yes.

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  3. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    i got me wiggn out on the in a word part....
    Grant

    1974 Chevy Blazer Cheyanne. but it is on 33's now, with saggy old springs. i am in Yuma Arizona if ya got any parts for me.
     
  4. 1Blazin71

    1Blazin71 1/2 ton status

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    My mamma told me there's no such thing as a stupid question...so here goes....

    Is it also the case that if you have a factory 3.73 D44, 4.56 will work with the same carrier?

    Im confused by SeventyFour's "...get new carriers on the higher side" and the cryptic "In a word...."???

    Can someone explain the "carrier break" concept a bit more?



    Matthew Meyer
    matthewm@inhollywood.com
    '71 Ochre K5 - 4" Lift 35"s
    ZZ4 350 - 700R
     
  5. 55Willy

    55Willy 3/4 ton status

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    in general you will need carriers for both axles to run the 5.13's
    I think there is a "thick" gear set availible to run the lower gears in the higher case.



    <hr></blockquote>
    What do you mean, Where did I get it??...I <font color=blue>BUILT</font color=blue> the damn thing!!
     
  6. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    The carrier break for D44 is 2.72 to 3.73 and 3.92 to 5.89
    The carrier break for 14BFF is 3.42 to 4.10 and 4.56 to 5.13
     
  7. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    yes, they make thick gears for the 14 bolt. i think they make them for the 44 too, but i am buying a detroit for thr front anyway so i might as well get the carrier i need and spend less on the gears.
    Grant

    take me drunk, i am home
    www.geocities.com/seventy4blazer/parts4sale.html
     
  8. txbartman

    txbartman 1/2 ton status

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    As I understand it...

    As the gears get lower (or numerically higher), the pinion gets progressively smaller. At a point, based more on ring gear size associated with the pinion size (that is why it is different for axles with different ring gears), the carrier itself is recommended to be changed. The ring gear mounts to the carrier and the carrier bolts into the diff housing. The different carrier positions the ring gear more appropriately for the smaller pinion. This keeps from a significant shifting of the carrier which may not even be possible. "Thick" gears can also be used. These gears have a thicker ring gear. the thicker ring gear counters the modified carrier position. I do not believe there are any downsides to using thicker gear sets. The only upside is that it keeps you from having to change the carrier.

    Hope this helps clear up the carrier break. If I have missed something or am not correct on something, someone please correct me. I will never know if I am wrong unless someone points it out to me.

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

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