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How strong is the 14 bolt SF?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by shum1, Feb 28, 2001.

  1. shum1

    shum1 1/2 ton status

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    I was thinking of getting the FF but the SF seems like an easier swap in my 1990 suburban. Are there any aftermarket positractions for this c clip axle? Thanks.
     
  2. bigerik

    bigerik 1/2 ton status

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    The 14 bolt SF has a 9.5" ring gear, and the 14 bolt FF has a 10.5" ring gear. The FF can stand up to more abuse than the SF, but the FF is, as you know, heavier and hangs a little lower. Get the FF(w/ a Detroit Locker) and live with the 8 lug ramifications; if you opt for the SF, you will want to step up to a FF later, and all the money put into the SF will be wasted. Even if you have to have 8 lugs in the rear and 6 in the front while you're saving for your new front end, you'll be glad in the end.
     
  3. jerseyk5

    jerseyk5 Registered Member

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    I just did the 14 sf swap and so far I found one from arb, auburn hi-pro series, and one from power trax. Not sure myself how good any of them are?
     
  4. shum1

    shum1 1/2 ton status

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    This vehicle is to be used primarily for towing. I'm having a hard time trying to find just the SF brake backing plates from a 1983 or newer that are needed to swap the FF into my car. Does the SF come in 6 lug? That would be a bonus. If so what year?
     
  5. jerseyk5

    jerseyk5 Registered Member

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    Yes, the 14sf comes in 6 lugs. Mine came out of a 95 C2500(3/4 ton) 2wd pick up. I had the perchs moved in and I had the double shock mount I had on my 10blt rear welded on. After that it bolts right up. I believe you want to look for one out of a 88-96 3/4 ton. You will need the conversion u-joint napa#447 and new emergency brake cables. The part numbers for the brake cables are also a napa part #s and are 93254 and 93898. I got my rear from truckparts.com. for 500.00. It was complete drum to drum and in really good shape. They had 3 or 4 more out there last time I looked.
     
  6. 90K5

    90K5 1/2 ton status

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    I'm going to find one from an 82-87 3/4 ton and use 6 lud axleshafts and drums. The spline count is the same so they will swap in. That way I don't have to move the perchs and shock mounts.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  7. shum1

    shum1 1/2 ton status

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    Good Idea 90k5, where do you look for just the shafts and drums? The junkyards I go to dont seem to want to sell axle parts only complete housings w/ axles. What size are the drums you plan on using?
     
  8. 90K5

    90K5 1/2 ton status

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    Whatever I can find. if you can go to a pick and pull or something, you may be able to swap out the axleshafts and drums before you buy the axle, then you wouldn't have to buy a complete axle plus other parts.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  9. AJMBLAZER

    AJMBLAZER Better to be lucky than good. Premium Member

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    Last time I was on Tractech's website, they were listing a Detroit Locker for the 14SF as a new item.

    1992 Blazer Sport, 350 TBI, 4L60, 3" Flowmaster, K&N, 3" Rancho, 285/75R16 on 16x8 Baja's[​IMG]
     

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