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12blt vs 14blt

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by NYC K5, Apr 19, 2000.

  1. NYC K5

    NYC K5 1/2 ton status

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    im upgrading my axles and am wondering to go with the 12 or 14 bolt. i heard that the 14 blt weighs about 800 pounds, how much does the 12 weigh, plus i heard the 14 has about 2" less under it. also i dont plan on running anything over 36"
     
  2. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>I don't know how much the 12 bolt weighs, but the 14 bolt is about 800 lbs. you could get more clearance by grindidng the bottom of the housing, but this is nt advised. If your only planning on 36" tires, than a sf 14 bolt would be right. It is availible in 6-lug (88-and on) and has a 9.5" ring gear as oposed to the 8.875" of the 12 bolt. Your from NY? i'm in bergen co. nj, where do you plan on finding an axle? Do you know of any good junkyards?</font color=blue>
     
  3. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    Correct me if I am wrong, but I have heard that the ff 14 weighs 200# more than a 10-bolt, on a 5000-6000# truck 200# is nothing, hell just kick out your passenger and you got your 200# back. I have 36" tires and a full float 14 has 9-3/4" under it (use that for comparison).

    Steve
     
  4. BIGJ

    BIGJ 1/2 ton status Author

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    There is no way a 14 bolt weighs 800lbs. More like 500lbs maybe. My friend and I moved one all over my garage when we did his axle swap, and there ain't no way I can pick up 400lbs and move it with ease by myself. If you are concerned about weight ditch the drums and run disks. The drums alone weigh about 60lbs a piece. That is almost the 200lbs you loose when swapping axles. Just my .02 cents.

    BIGJ
     
  5. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    I agree, I moved my 14-bolt around the garage and then slid it under my Blazer by myself, so it can't weigh that much.

    Steve
     
  6. '73 K5

    '73 K5 1/2 ton status

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    I heard the 14 bolt was just a hair over 500 pounds. No way its 800.

    '73 K5
    Chevy good...Ford bad
     
  7. Executioner

    Executioner 1/2 ton status

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    Do you have pictures of that 14 bolt showing its weight, we all would love to see it.
    Thanks alot
     
  8. Bigd

    Bigd 1/2 ton status

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    Just swapped my 12 bolt for a 14 bolt ff.No way it weighs 800 more like 500.Two guys can move it around not too bad.If you're willing to get new rims and tires.And change the front it's the only way go.Comparing the 14 bolt too the 12 bolt makes the 12 bolt look like something from a jeep.
     
  9. titanic

    titanic 1/2 ton status

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    I'd go with the 14 bolt and forget it
     
  10. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    According to an axle comparison article in Petersen's 4Wheel magazine last year, the 10 bolt is approx 345 lbs and the 14-bolt is 545lbs. Off Road Unlimited says that a rear disc conversion shaves about 80lbs off the weight of the 14-bolt.

    Hope this helps

    Brian
    Still in search of the TBI KING!!
     
  11. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    It has been about a year but I belive on my truck with 32's that under the diff of the 12 is about 9.5 inches. You have one other option here. D60 rear. It is stronger than the 12 a FF but maybe just a hair less strong than a 14. they say a 14 is closer to strenght of a D70. The big gain would be diff clearence.

    Diging it in the dirt with my K5's
    Grim-Reaper
     

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