Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

DO SF 14 BOLTS EXIST IN 88 3500 GMC TRUCKS???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Brians 60s, Sep 7, 2001.

  1. Brians 60s

    Brians 60s 1/2 ton status

    Joined:
    Jun 12, 2000
    Posts:
    1,115
    Likes Received:
    0
    Location:
    Bend, Oregon
    I found a 1988 gmc 3500 truck that was lightly rolled. A guy I know is selling it for $500. I went to go look at it earlier today and to my amazment, it had a sf 14 bolt underneath it. Not only that, but I always thought 3500's and k30's did not change body styles till 92. I saw the registration to confirm the year and 3500 status. Did someone swap this thing in, or am i losing it.

    IT'S A 1 TON THING.... IF I HAVE TO EXPLAIN IT, YOU WOULDN'T UNDERSTAND!!!
     
  2. Pugsley

    Pugsley 1/2 ton status

    Joined:
    Jan 16, 2001
    Posts:
    3,556
    Likes Received:
    0
    Location:
    Tucson, Arizona
    No clue - you'd almost have to decode the VIN. Sounds to me like a K2500 "salvage title special" - a set of 3500 doors, and a DMV inspector who just wrote what was on the badging.

    1 tequila 2 tequila 3 tequila Floor
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  3. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

    Joined:
    Jun 16, 2000
    Posts:
    1,932
    Likes Received:
    0
    Location:
    Sims, NC
    The 3500 regular cab trucks did go to the new body in '88, only the crew cab trucks kept the old body through '91. I believe the single rear wheel 3500 trucks did get the sf 14 begining in '88.

    '85 K5 : Run it til it breaks, then fix it and go again!
     
  4. ken

    ken 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,244
    Likes Received:
    0
    Location:
    Anaheim, CA
    The single cab, single rear wheel '88 3500s had Dana 70s in them, actually 70-3s they were called. Only the 2500s should have had the SF14b, and even then, the HEAVY 2500s with the 454 option would have a FF 70-3. I don't know why they didn't use FF 14Bs, but they didn't.

    ken
     
  5. californiak5

    californiak5 1/2 ton status

    Joined:
    Oct 25, 2000
    Posts:
    820
    Likes Received:
    0
    Location:
    Oceanside, Ca. 92056
    Where can I find more info on the FF 70-3 axles. Do these axles have the pinion like a 14FF? Do they have 14 bolts on the cover. I have one out of a 88 1 ton crew cab that looks like a 14FF but it has alot more cooling fins on the pumpkin than I have seen before on 14FF. Could this be one of those FF 70-3's? Thanks for your help in advance, and if you or anyone knows where to find some pictures of these axles (FF 70-3) that would be great.

    See Ya,
    Keith

    [​IMG] <font color=green>Born to Drive My K5</font color=green> [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/californiak5>CaliforniaK5's Pictures</a>
     
  6. pcorssmit

    pcorssmit 1/2 ton status

    Joined:
    Jan 2, 2001
    Posts:
    1,346
    Likes Received:
    0
    Location:
    Denver, CO
    Dana 70s use the same 10 bolt cover as the Dana 60s.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  7. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    I know the 14B SF's are a 6 lug design... are any of the others a 6 lug tupe design? I would relly love a bit stronger rear for towing then the 12B, but really hate to change wheels and tires for a 14B ff.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  8. Pugsley

    Pugsley 1/2 ton status

    Joined:
    Jan 16, 2001
    Posts:
    3,556
    Likes Received:
    0
    Location:
    Tucson, Arizona
    Some 14 SF's are 8 lug too - my buddy's got an 83 K20 with a SF rear.

    1 tequila 2 tequila 3 tequila Floor
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  9. elkboy

    elkboy 1/2 ton status

    Joined:
    Aug 18, 2000
    Posts:
    293
    Likes Received:
    0
    Location:
    Hillsboro Oregon
    My dad had a 89 3500 extra cab 4x4 SRW 8800 GVW. It had a 14 FF in it ( I know I changed several seals in it). 8800 GVW was the lowest GVW available for a late 80's (88 and later) 3500. I remember when he bought it he had to go 3500 for the FF in the rear to tow his 5th wheel and the main diff from the 2500 was the FF 14 bolt rear. The 2500 that year maxed out at ~8200 GVW and had a SF 14 bolt. The 6 bolt 14 bolt SF came in the under 7200 GVW 2500 trucks. If the truck is a 3500 and has a SF 14 bolt in it it's been changed.


    <font color=red> Elkboy </font color=red> 82 K5 fuel injected H.O.305, TH350/205, 14bolt/10bolt and 39.5 TSL's.
     
  10. Russ

    Russ 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    509
    Likes Received:
    0
    Location:
    Summerdale AL
    Brian,
    When I was stationed in Norfolk we had an 88 3500 with the IFS front and SF14 bolt rear at work. The truck was single rear wheel longbed single cab. Maybe it was just a military contract or something, but it was there.
    Russ
     
  11. elkboy

    elkboy 1/2 ton status

    Joined:
    Aug 18, 2000
    Posts:
    293
    Likes Received:
    0
    Location:
    Hillsboro Oregon
    The standard cab 3500 must have been light enough to get by with the SF 14bolt. I had an 85 K20 rated at 8600 GVW with a SF 14bolt. I've never seen seen a 3500 with a SF, but I belive they must have made some.

    <font color=red> Elkboy </font color=red> 82 K5 fuel injected H.O.305, TH350/205, 14bolt/10bolt and 39.5 TSL's.
     
  12. K5DRAGER

    K5DRAGER 1/2 ton status

    Joined:
    Jul 27, 2001
    Posts:
    1,164
    Likes Received:
    0
    Location:
    Momence, IL
    I had a 88 heavy 3/4 ton 4x4 suburban and it had a sf 14 and it had a gvw of 8600. Don't know if this helps much
     
  13. californiak5

    californiak5 1/2 ton status

    Joined:
    Oct 25, 2000
    Posts:
    820
    Likes Received:
    0
    Location:
    Oceanside, Ca. 92056
    Thanks for the info Pete. I thought they were like the 60's but was not sure.

    [​IMG] <font color=green>Born to Drive My K5</font color=green> [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/californiak5>CaliforniaK5's Pictures</a>
     
  14. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    Mikey, my SF 14 bolt is 8 lug ('52 K20).

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

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    I've been searching for one that is decently priced, but have yet to even find one. New or old... would probably end up getting some superior or Moser axle shafts in 6 lug and want to move up to 4.56's. Just wondering what everyone has seen them selling for around them


    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     

Share This Page