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14 FF with 4.56 gears

Discussion in 'The Garage' started by FL84K5, Jun 27, 2002.

  1. FL84K5

    FL84K5 1/2 ton status

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    Are there any 14 bolt FF with 4.56 gears from the factory? How hard are they to find? When I lift my truck, I'm going to put a 14 bolt in the rear and it sure would be easier if it already had the gears in it I'm looking for /forums/images/icons/smile.gif
     
  2. Hossbaby50

    Hossbaby50 3/4 ton status

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    Yes there are axles that came from the factory with 4.56 gears. They are rare in civilian form though. The axle you want to look for is an axle (actually both axles) from the 1 1/4 ton CUCV Military pcikup trucks. The rear axle is a 14bff with 4.56 gears and a detroit locker from the factory. So then you don't have to worry about adding a Locker, its already there. The front axle out of those trucks is the D60 with 4.56's so you want that too if you can get it.
     
  3. TX Mudder

    TX Mudder 1/2 ton status

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    The military 1 tons come w/ 4.56 and detroit off the line.
    haven't seen a civilian 14 bolt come w/ 4.56, but that doesn't mean they didn't make them.
    - Mike
     
  4. FL84K5

    FL84K5 1/2 ton status

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    Where would I find these military truck with the axles in them? Are there salvage yards for these types of trucks that I could pull the axels out of?
     
  5. mudduck

    mudduck 1/2 ton status

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    just search a few yards i have found several 14bff rears with factory 456 gears,of course all these were out of two wheel drive trucks
     
  6. FL84K5

    FL84K5 1/2 ton status

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    Is there a difference between 2wd and 4wd 14 bolt?
     
  7. beater74

    beater74 1/2 ton status

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    nothing /forums/images/icons/smirk.gif
     
  8. txbartman

    txbartman 1/2 ton status

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    I believe I remember someone saying that you could get a 14BFF with 4.56s factory from under old motorhomes with certain engines. I know that is vague, but sounds familiar to me. And, it would make sense.
     
  9. azblazor

    azblazor 1/2 ton status Premium Member

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    The K30 in my sig is stock from the factory - civilian.
     
  10. Mobile_Mechanic

    Mobile_Mechanic Registered Member

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    My 1984 K-30 came with 4.56s. I know the original owner of the truck and he ordered a 1 ton manual trans, 205 t-case. the only down fall is he ordered it with a straight 6 engine!
     
  11. eldon519

    eldon519 1/2 ton status

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    My local Army Reserve has a couple of these K-30s sitting around that I'd like to get my hands on. Do you think they would sell one to me or would I have to deal with tons of government red tape and the like? If not, where is the easiest place to find old army K-30s?
     
  12. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Any government auction. /forums/images/icons/wink.gif

    Type in "government auctions" in a search box and see what shows up. There will be quite a few of them.
     
  13. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I have an '84 M1008 I won thru a government auction site.

    It has the 4.56 gears and Detroit Locker, both from the factory. /forums/images/icons/wink.gif
     
  14. arq

    arq 1/2 ton status

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    try the six cylinder Kxxs with manual tranny.

    ARQ.
     
  15. K10ANDYKHAMNIC

    K10ANDYKHAMNIC 1/2 ton status

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    i had a 78 3/4 ton gmc with 14 ff with 4.56s and some v8 engine and and sm465 and 205 t case..
     
  16. mountainexplorer

    mountainexplorer 1/2 ton status

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    I bought a '77 1-ton single wheel 4x4 Crew cab a little while back that had factory 4.56 gears in the FF 14-bolt rear and Dana 60 front. I had assumed they were 4.10's before I bought it, but I found the original equipment sticker in the glove box that said:
    GT5 REAR AXLE - 4.56 RAT

    It originally came with a SB400 and a TH400 tranny.
     
  17. Pure Insanity

    Pure Insanity 1/2 ton status

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    Hey Jason, I have an extra 14 FF that I will be getting rid of soon. I am not sure of the gears but I will be checking soon. The one going into the Blazer has 4.56's in it, for now. But the extra one has had a very easy life and was well cared for. The guy I got it from serviced the truck for years until the guy scattered the motor. When you get ready to get one let me know. When I get it opened up Ill let you know what gears are in it.
     
  18. FL84K5

    FL84K5 1/2 ton status

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    When I get ready to do the lift I'll see if you still have it. Not sure how long that will be though, I'm going to get a winch and winch bumper before I do the lift.
     
  19. Pure Insanity

    Pure Insanity 1/2 ton status

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    Sounds good. Remember I have a 6" lift and wheels Ill be getting rid of too. Only thing I dont have is the lift arm for the steering and tires.
     
  20. turd427

    turd427 Registered Member

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    go to some military surplus auctions, and they they come with a gov lock, not a detroit, you can not put a detroit in one that came with a gov lock but if you find one that is open you can put a detroit in it, plus there a dime a dozen.
     

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