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14b carriers share 4.11 ratio?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BorregoK5, Feb 5, 2002.

  1. BorregoK5

    BorregoK5 1/2 ton status

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    14 Bolt carriers came in two sizes from GM, up to 4.11 and 4.11 on up (or down if you prefer). How do you tell the two apart? Can anyone cross reference a 3977342 carrier casting number for me? Thanks.

    I started with nothing and I still have most of that left! - <a target="_blank" href=http://www.echobit.com:81/k5/> Pictures</a>
     
  2. POWERMAD

    POWERMAD 1/2 ton status

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    Ya might try calling the GM dealership and have them cross it.

    <font color=green> Too bad ignorance isn't painful </font color=green>
     
  3. k5king

    k5king 1/2 ton status

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    just look on the ring gear for the gear numbers,it tells the ratio,,if not,,count the ring gear teeth,,then count pinion teeth,,then divide the ring gear number (larger) by the pinion gear number. ( I.E. 50 / 12 =4.16)
    of course,,if i would have actually read this post awake i would have known you didn't give a hoot about the ratio,,oh well [​IMG]

    <font color=purple>ANYBODY LOSE THEIR JEEP????????
    I JUST FOUND ONE UNDER MY BLAZER!!!!</font color=purple>
     
  4. POFF

    POFF 1/2 ton status

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    The ring gear should be stamped somewhere in this format: 41 10 73 or 10 41 73 the first two numbers are the ring and pinion tooth count (not sure which is first) then the last two digits of the manufacture date. I don't think 14Bs actually have 4.11s? I think it's either 4.10 or 4.56. Which must have two different carriers? I hope not I want to eventually go to 4.56.

    '70 K-20 San Diego, CA
    I know, I can't spell!
     
  5. HarryH3

    HarryH3 1 ton status Author

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    4.10's dont' share the same carrier as the 4.56's. [​IMG] The split is any ratio up to 4.10 takes one carrier, while 4.56 and (numerically) higher takes another. Someone out there probably makes 4.56 with an extra thick ring gear, so that you can get away without changing the carrier.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
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  6. BorregoK5

    BorregoK5 1/2 ton status

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    My local dealership is a pain in the butt, they don't like to do anything unless its for a "newer" vehicle.

    I know my gear ratio, it was 4.11, hence the post (consequently there were no numbers stamped on this one which is a first, so I had to count the teeth).

    I thought I read somewhere that 4.11's were shared by both carriers but it would apear otherwise. Since its the small one, time to weld the spiders. Thanks everyone!

    I started with nothing and I still have most of that left! - <a target="_blank" href=http://www.echobit.com:81/k5/> Pictures</a>
     
  7. HarryH3

    HarryH3 1 ton status Author

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    The difference between the two carriers, is that the one for 4.56 and numerically higher gears shifts the ring gear over closer to the pinion gear (the pinion keeps getting smaller, with fewer teeth as the ratio gets numerically higher). It's this shift that prevents the 4.10 gearset from working on both carriers. It will only physically line up the gear teeth properly on the carrier that is designed for it.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
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  8. BorregoK5

    BorregoK5 1/2 ton status

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    I think your right Harry, I'll have to live with the 4.11's a little longer untill I can purchase a locker and bump up to some steeper gears. I don't think I've seen any carriers other than the small one out in the salvage yards here anywhere, might need to find one in case I decide to go detroit.

    I started with nothing and I still have most of that left! - <a target="_blank" href=http://www.echobit.com:81/k5/> Pictures</a>
     
  9. RedDwarf

    RedDwarf 1/2 ton status

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    HarryH3 is on the money, the break is between 4.11 and 4.56

    But! you can still have 4.56 gears. Some companies make a "thick" ring gear to compensate for the movement Harry mentioned, so the lower gears will fit on the higher carrier.
     
  10. BorregoK5

    BorregoK5 1/2 ton status

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    What type of drawbacks would this possibly present?

    I started with nothing and I still have most of that left! - <a target="_blank" href=http://www.echobit.com:81/k5/> Pictures</a>
     
  11. k5king

    k5king 1/2 ton status

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    dwarf is correct,you can get thicker ring gear's to compensate for the offset.
    as for a drawback i don't see any.you have a much thicker ring gear,which means more steel to hole it together when you abuse it.what would you prefer to hold your truck in one piece ? a half in thick piece of plate steel,or one that's an full inch ? the pinion will still be the same size but you get added strength of a thicker ring gear.


    <font color=purple>ANYBODY LOSE THEIR JEEP????????[​IMG]
    I JUST FOUND ONE UNDER MY BLAZER!!!![​IMG]
    [​IMG][​IMG]</font color=green>
     
  12. mudddog91

    mudddog91 1/2 ton status

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    OK please tell me where i can get one of these thick 4.56 gear sets cause this is what I want to do but dont know where to get the gears from!!!!!!!!!!
     
  13. HarryH3

    HarryH3 1 ton status Author

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    Check with these guys:

    <a target="_blank" href=http://www.reiderracing.com>www.reiderracing.com</a>

    Or any of the places that advertise gears in the various 4WD mags.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     

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