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dana 70 or 14 bolt FF

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by James90, Aug 28, 2000.

  1. James90

    James90 1/2 ton status

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    witch is better and/or stornger? and witch is cheper to get or build?

    or sould I go with a duce and a half rockwell

    [​IMG]Go prepared

    I have a Shotgun a Rifle and a 4WD(K5) and Country Boy Can Survive!!!!
     
  2. AJMBLAZER

    AJMBLAZER Better to be lucky than good. Premium Member

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    I posted a question similar to this a few months ago, and the general consensus was that a 14 bolt FF would be much better. Strength wise the 14 has it, but only by a little bit. Size they're practically the same, but cost is where the 14 gets it. You can pick a good 14 up for a couple hundred. Good luck even finding a D70. Hard to come by. There is more stuff available for the 14, and all of it is cheaper. Just an economy thing.
    Oh yeah, and on the Deuce and a half axles, they are tough as hell, but only available in 6.72 ratio. So unless you are planning on running 40" or bigger with an OD tranny, I wouldn't bother. Hope this helps.

    1992 Blazer Sport, 350 TBI, 4L60, 3" Gibson, K&N, 3" Rancho, 285/75R16 on 16x8 Baja's
     
  3. ken

    ken 1/2 ton status

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    Also, the 2 1/2 ton Rockwells use metallurgically-inferior (is that a word?) axle shafts of "only" 1 5/8" diameter. 14 bolt shafts are closer to 1 9/16".

    ken
     
  4. chevy4x4

    chevy4x4 1/2 ton status

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    14 bolt is a lot easier to find. I'll sell you a 5 ton rear axle if you want.
     
  5. realsquash

    realsquash 1/2 ton status

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    They are close enough to equal in strength that it's a tie. The detroit locker is cheaper for both because it doesn't replace the carrier in these 2 axles. Then again, neither does a lock-rite, which is a little less expensive than the detroit. Brakes, well TSM makes a fine disc brake kit. The 14-bolt will cost under $200, and almost certainly come with 4.11 gears.

    Go with the 14-bolt.

    Squash
    http://www.trailrunners4x4.org/users/realsquash
     
  6. Shawn

    Shawn 1/2 ton status Premium Member Author

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    One of the mags this month just talked about these axles. According to them, the 70 only hangs down 1/4" lower than the 60 and actually uses the same cover as the Dana 60. I still prefer the 14 bolt since parts are so abundant. Any salvage yards will have the parts you need for the 14 bolt.

    Shawn
    87 K5
    few mods
     
  7. James90

    James90 1/2 ton status

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    cool

    thanks guys

    how does a dana 60 up frount and a 14 bolt FF in the rear sound

    [​IMG]Go prepared

    I have a Shotgun a Rifle and a 4WD(K5) and Country Boy Can Survive!!!!
     
  8. Brians 60s

    Brians 60s 1/2 ton status

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    Sounds great James I'll hook you up with a matched set.
    corporate 14 bolt rear locked up with 4.56 gears and a
    front dana 60 with a new carrier and new 4.56 gears all
    for $1,650.00. You would have to pick up shipping. What
    do ya say?

    MUDNUT
     
  9. James90

    James90 1/2 ton status

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    that sounds gread just got to find the money some where!



    [​IMG]Go prepared

    I have a Shotgun a Rifle and a 4WD(K5) and Country Boy Can Survive!!!!
     

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