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is a 14 bolt sf even worth the hassel?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 1990K5, Apr 23, 2001.

  1. 1990K5

    1990K5 1/2 ton status

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    i was wondering if a sf 14 bolt is worth a dam? locker or spool availability? ground clearance compared to a ff or a 12 bolt? still a c-clip axle?
     
  2. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>Just go FF, throw in a Detroit and be done with it forever. I almost went SF but why would you want to keep the small 6 lugstuds when you can have 8 thick ones? As for ground clearance, back up, put it in D and hit that rock harder [​IMG] or just go around it. Its not like a 1/2 ton axle where beating it on a rock can break it.</font color=blue>

    [​IMG]
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Um yeah, what Chris said...[​IMG]
    The FF 14 can also be ground on the underside for another 3/4" of clearance...something I plan on if the insurance company ever stops jacking me around.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  4. 1990K5

    1990K5 1/2 ton status

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    the studs are the least of my worries of breaking- the funds arn't there to support new wheels, tires, 4:56's, lockers ,front end, disc conversion, and drive lines especially when mine are all new, need i say more, if i got a sf 14 it would save me a couple thousand $$$ and i assume it would hold up better than my 12 bolt-- so, is the sf 14 bolt any good? ( i would spool it or weld it )
     
  5. 1990K5

    1990K5 1/2 ton status

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    ya but the sf already has less mass on the bottom of the diff
     
  6. CaptCrunch

    CaptCrunch 1/2 ton status

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    IMO I think the 14SF is worth it... although ideally a 14FF would be better. I mean if you want something stronger then a 12B and still 6 lugs and 15" rims then it fits the bill. Although they are generally pretty spendy... you need to move the spring perches and yes it is still a C-clip design and small lugs.
    Not much more ground clearence or less weight then a FF. It's worth it to some, but myself if I change from the 12B I have it is gonna be 14FF and a D60!

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Sorry I just hate 'C' clips and those dainty little 7/16 studs...it is better than a 12 bolt though. My point with the clearance was you could have bombproof strength and the same ground clearance or better than a SF with a little bit of grinding...

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  8. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>You can keep your drivelines with the 3/4 ton stuff. You just need the hybrid u-joint (napa part #447). You dont absloutely need disks right away and you can use 15" wheels on 3/4 ton axles. They fit over the rear drums with room to spare and only require slight grinding in the front. Ask Rene, I must have said this at least a few hundred times already [​IMG] [​IMG]. I have some OK pictures of how much I ground off the calipers, its not a lot. Drop me a PM if you want to see. </font color=blue>

    [​IMG]
     
  9. 1990K5

    1990K5 1/2 ton status

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    ok ok i know a fella here in co. that will set up clean 14 ff's w/ 4:56's complete hub to hub for 325.00, maybe ill go to moab this weekend and try to destroy my 12 bolt so i have an excuse.
     
  10. 1990K5

    1990K5 1/2 ton status

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    the 14bolt ff"s arnt that expensive but those fronts are crazy high
     
  11. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>True, the dana 60s are ridiculous. I got a dana 44 for $250 and put rotors and calipers on it. I'm saving up for another truck to replace my commuter car so the 60 will have to wait. I got my 14 for $100 and needed a 4.10 8 lug front to match and I needed it fast so I got a 44. I'll see how easy I can break this, mabye down the road I'll get a 60. For $250, you cant go wrong with that axle. Thats a good price for what your getting</font color=blue>

    [​IMG]
     
  12. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    I'll say yes since I am about to purchase one and install it. One main reason for me though was the rims and tires. I have some Mickey Thompson rims which cost fat bucks and I am not gonna sell them at a loss to buy new ones to fit a FF. Besides for my need it'll work for me. If it fits your needs and what you want it for then I say yeah it is worth it.....

    "Suck Fumes Ford Boy"
    "I love my country, I fear my government"
    "What if the hokey pokey is what it's all about?"
     
  13. Emmettology 101

    Emmettology 101 3/4 ton status

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    I think they are if you dont want to go through the hassle of switching to 8 lug... You nly loose about 1" clearence wise and it is a stronger axle than the 12 bolt...

    Mike - <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>[​IMG]
     
  14. LittleJimmy

    LittleJimmy 1/2 ton status

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    I think it will be worth it. But it depends on what you plan on doing with the truck. If you are going to do some serious wheeling or rock crawling, I would do it. The 10 bolt will not hold up. I am getting a dana 44 front and a 14 bolt rear and plan on running 40's. If you run anything bigger than that on a 10 bolt something will break. Like an axle shaft or the gears. And I am told the rearend is all ready geared. Hopfully getting it this weekend.
     
  15. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Quite honestly 40's on a stock Dana 44 is aking for it unless you drive gently...it can be upgraded with stronger axles and fusable hub thingy's[​IMG]
    There was a post on how big a tire a Dana 44 could live with a few days ago, have a look for it...

    If I was going to run 40's I'd look into a Dana 60 front.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  16. 1990K5

    1990K5 1/2 ton status

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    COME ON MAN GIVE ME SOME CREDIT, ATLEAST I HAVE A 12 BOLT!
     
  17. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    I looked into a SF14B when I did the gear swap on my 80. The reason I stayed with the 12B was because I couldn't find a Detroit for the SF14B. If you are going w/ a L/S or if a Det is avabilble I would go for the SF14B.

    Jim '80 GMC
    Freedom First!
    <A target="_blank" HREF=http://www.bigjbear.coloradok5.com>http://www.bigjbear.coloradok5.com</A>
     
  18. HispanicPanic

    HispanicPanic 1/2 ton status

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    ok somebody explain why a 14sf is stronger than the 12 bolt with the exception of the ring and pinion cuz it's still a 30 spline and the axle shafts are still the same in diameter as a 12 blt. so ? but any way to the orig. ? go 14 ff or leave it alone thats the reason im leaving mine alone ive gone to far $ to start all over again

    <A target="_blank" HREF=http://jimjim.coloradok5.com>http://jimjim.coloradok5.com</A> Not all Hispanics drive lowriders
     
  19. 79Jimmy

    79Jimmy 1/2 ton status

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    The 14 bolt SF is 33 spline and 1.37" diameter axle shaft which are both better than a 12 bolt.


    79jimmy@home.com
     
  20. Texan

    Texan 1/2 ton status

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    BTW.. My 14SF has 14MM studs, not 7/16 like 10 bolts....

    <font color=orange>STEVE<font color=orange>[​IMG]
    89 Blazer
    67 Camaro 468
    68 CamaroSS 327
    98 GTP
     

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