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Difference between 14 bolt FF and SF

Discussion in 'The Garage' started by 1979Jimmy, Jul 8, 2002.

  1. 1979Jimmy

    1979Jimmy 1/2 ton status

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    I was curious what the difference in strength was between FF 14 bolts and SF 14 bolts. I did a search but it didnt turn up much.
     
  2. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> The SF has a smaller ring gear, 9.5 vs. 10.5, and the obvious added strength of the full floater design versus the semi floater design. If you don't know the difference, essentially on the full floater the axleshaft's sole duty is to drive the wheel, there is a spindle like on the front axle that supports the weight of the truck on wheel bearings. On a SF axle the single bearing in the end of the axletube supports the weight of the truck and rides on the shaft, so the shaft is both holding the weght of the truck and driving the wheel at the same time. </font color>
     
  3. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    the FF is stronger, easier to get parts for, and as common as it gets, but the SF has better clearance than a shaved FF, it's unique, and much cooler. /forums/images/icons/cool.gif /forums/images/icons/smile.gif

    oh and yes i have a SF
     
  4. HarryH3

    HarryH3 1 ton status Author

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    The big difference is that if you snap an axle shaft in a FF, you'll still be rolling along. When you snap an axle shaft in a SF, the tire and wheel will come off the vehicle... /forums/images/icons/shocked.gif
     
  5. 1979Jimmy

    1979Jimmy 1/2 ton status

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    Hmmm.... something like that really makes a ff worthwhile. Looks like thats what i will be going for.
     
  6. chulisohombre

    chulisohombre 1/2 ton status

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    the 14 bff is almost as common as fining a 350 these days.i went to 4 junkyards and every one had at least 2 of them.the hard part is if you are going to swap the front end to 8 lug and finding the correct hubs and backing plates.every junk yard i went to that had the 14 bolt didnt have the front hubs to go with it.i did find them but in cali and not PA where i live.just my experience. /forums/images/icons/laugh.gif
     
  7. tomseviltwin

    tomseviltwin 1/2 ton status

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    The detroit locker is $327 for ff and about $550 for sf.
     
  8. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    you trendy little sheep!!!!!!!!!! yall just conform and follow the leader don't ya?

    i'm gonna get a dana70 rear end /forums/images/icons/wink.gif
     
  9. tori89k5

    tori89k5 1/2 ton status

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    /forums/images/icons/tongue.gif ...OH YAAAA,..... well im gonna get a Dana 100 /forums/images/icons/tongue.gif
     
  10. blazerboy72

    blazerboy72 1/2 ton status

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    oh yeah i have 1 70 and 3 14b /forums/images/icons/grin.gif
     
  11. 1979Jimmy

    1979Jimmy 1/2 ton status

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    Lol that would be cool to say I had a dana 70 but then the dif would drag on the ground with my 35s. Ill take a 14b off your hands though. Come on you wanna give one up or sell it to a fellow ck5er for cheap cheap cheap, lol /forums/images/icons/smile.gif
     
  12. kennyw

    kennyw N9PHW Premium Member

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    Better yet come get one of these from me for free!
    [​IMG]
    (The dump truck axles not the Dodge in the background /forums/images/icons/wink.gif )
     
  13. 1979Jimmy

    1979Jimmy 1/2 ton status

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    Are those from your international. What kind of axles are those?
     
  14. kennyw

    kennyw N9PHW Premium Member

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    I believe it is an Eaton bogie setup but I have not spent any time IDing it. They are on a 1957 IHC Dump truck chassis I am parting out. Bet they would not break under a 1 ton pickup /forums/images/icons/grin.gif

    more pics:
    Click 1
    Click 2
     
  15. tomseviltwin

    tomseviltwin 1/2 ton status

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    The 70 has better clearance than a 14bff, silly!!
     
  16. TopOff

    TopOff 1/2 ton status

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    ARB makes Air-Lockers for the SF! Ask me how I know!
    /forums/images/icons/crazy.gif /forums/images/icons/wink.gif

    I have not heard of anyone breaking a FF axle shaft or a SF Axleshaft, let alone the C-clip on a 14 bolt SF.
    Has anyone else heard or seen?
     
  17. beater74

    beater74 1/2 ton status

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    </font><blockquote><font class="small">In reply to:</font><hr />
    ARB makes Air-Lockers for the SF! Ask me how I know!

    [/ QUOTE ] okay how /forums/images/icons/grin.gif
     
  18. afroman006

    afroman006 1/2 ton status

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    Is it possible to convert a SF to a FF? Also which axle would come stock on a 84 Chevy 3/4 ton heavy (2wd)?
     

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