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Why not a 14FF?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fr8train, Aug 2, 2001.

  1. fr8train

    fr8train 1/2 ton status

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    WAHHHHHOOOOOOOOO!!!!!!! My dads company got three NEW 3500HD Chevys today. I did the old kick the tires and flex the desiel grunt/clack. I decided to take a look at the rear and NO 14FF!?!?!?!?!? Looks like a D60 or D70. I couldnt tell between the two because I had no way to measure the ring gear. Why didnt GM use the 14FF? Anyone else own/us one with this rearend?
     
  2. Gold Rush

    Gold Rush 1/2 ton status

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    I have a Chevy 3500 Dually and it has a D70. I wouldn't want a 14 FF in my dually cause it isn't strong enough.


    David 75K5
    <a target="_blank" href=http://www.extremeblazer.com>http://www.extremeblazer.com</a>


    [image]http://www.extremeblazer.com/sideapproachL.jpg[/image]
     
  3. bigk

    bigk 1/2 ton status

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    Up until a few months ago I was a salesman at Buford Ward Chevrolet in Quincy IL. We went to a seminar on the HD's before they were available to the public and they told us it's a new GM rearend, just increased from 10.5 inch ring gear to 11.5. Should be as strong as anything on the market. Don't expect your local salesman to know this since they're probably dumbasses like most of the guys I worked with.

    Karl
    Temporarily Unemployed Underwear Model
    87 3/4 ton
     
  4. ScoobyDann

    ScoobyDann 1/2 ton status

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    well hot damn, i gotta trate the 14 for a new axle now---jk

    sun desert offroad http://community.webshots.com/user/scoobydann
     
  5. ChadH82

    ChadH82 1/2 ton status

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    Is this just available in Dually form or is it single wheel also?

    Chad
     
  6. bigk

    bigk 1/2 ton status

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    Every HD, no matter what configuration. Even a shortbed extended cab.

    Karl
    Temporarily Unemployed Underwear Model
    87 3/4 ton
     
  7. fr8train

    fr8train 1/2 ton status

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    So I am guessing that this is the GM answer to the Sterling rearend of Ford.
     
  8. ScoobyDann

    ScoobyDann 1/2 ton status

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    the 14 was still stronger, i guess gm just wanted to up the ante

    sun desert offroad http://community.webshots.com/user/scoobydann
     
  9. thatK30guy

    thatK30guy 1 ton status Premium Member

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    The local trashman here in town got a brand new 2500 HD 4x4 single wheel truck. It has the HUGE Dana rear in it. I thought it was the D70. Sure looked bigger than a 60. Is this the rear you are talking about?

    <font color=blue>Daddy told me while learning to pee......"if you shake it more than twice, then you are playing with it!!!"</font color=blue>
     
  10. fr8train

    fr8train 1/2 ton status

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    YES!!!!!!!!
     
  11. Blazer1970

    Blazer1970 1/2 ton status

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    For the '01 and '02 model year trucks:

    2500HD trucks with a 6.0 engine have the old style 10.5" FF. 2500HD trucks with Duramax or 8.1 engines, and all 3500 trucks get the new 11.5" 14 bolt FF. 3500HD trucks, which are still the '88 - '98 body style (cab &amp; chassis only) probably still get the Dana rear end.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     
  12. MAN, can you imagine what a ring gear thats almost 12" would look like? Whats next a 14 FF with a 14" carrier?[​IMG]

    Damn I need to learn how to use my welder!![​IMG]
    (90 Jimmy 350 TBI, 14 FF/10 bolt, 4.56, tires ??
    (ftn96)
     
  13. BlazerGuy

    BlazerGuy 3/4 ton status

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    Damn I can't wait till one of those 3500HD's shows up at the junkyard! [​IMG]

    <a target="_blank" href=http://www.k5.rockcrawler.com>Click here to see my K5</a>
    *<font color=red>under construction</font color=red>*
     
  14. 84_Chevy_K10

    84_Chevy_K10 Banned

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    No it's not a Dana 70!! That's the NEW 11.5" 14 FF.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  15. 1990K5

    1990K5 1/2 ton status

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    84 chevy k10 is right it is not a dana 70, dana 70 and 60 use the exact same housing. and to add to what somebody said up above, the dana 70 may be a hair stronger than a 14 but there is NO sitsuation where you would break a 14 but a dana 70 would be just fine, lets be realistic.
     
  16. Cavalry

    Cavalry 1/2 ton status

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    AS far as a 14bolt being not strong enough for a dually..I would have to disagree. My dumptruck has a 14bolt been loaded down WAY over the GVW and never a problem. The only time I broke it was when a drunk in a full size caddy slammed into the drivers wheel doing about 50. Tore the axle off the truck and cracked the housing. The axle still was able to be driven on without a load. That is a tough axle!

    "There is a fine line between hobby and mental illness"
    Luke
    84 K5
     
  17. Donovan

    Donovan 1/2 ton status

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    That new rearend is made by American Axle. They are the same people that make the 14 bolt rear. You stick a 14 bolt next to the 11.5" new rearend and the new one makes a 14 bolt look small. It is kind of like looking at a 12 bolt and 14 bolt and the 14 bolt dwarfs that little 12 bolt. My brother has one of the new D'max trucks and I just about pulled the axle out the other day to see what size thoughs axles are but I didn't want to make it leak. Maybe one day I will.

    Donovan
    Bigger is Better
     
  18. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Kinda like putting a 10 bolt next to my 14 SF. Looks like a 10 bolt on steroids!

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     

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