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14 bolt SF/FF questions

Discussion in 'The Garage' started by KevinsK5, Jan 3, 2006.

  1. KevinsK5

    KevinsK5 1/2 ton status Premium Member

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    What year did GM replace the 14FF with the 14SF in 3/4 ton single wheel trucks and suburbans? What is most common u-joint size on a 14FF, 1350? Thanks, Kevin
     
  2. MTBLAZER89

    MTBLAZER89 3/4 ton status GMOTM Winner

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    I believe it was somewhere in the 78-81 era when the SF's started showing up in the 3/4 tons. Nothing is exact with GM though. They had a lot of overlap in all of their changes in those years. Yeah 1350 is the 14BFF joint
     
  3. AV8

    AV8 Registered Member

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    I believe the change occured between 82-83.
     
  4. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    81 was the first year of the 14bsf. the diesel and bigblock 2wd 3/4 tons got a 14bff, all the other 3/4 tons got a sf
     
  5. 2500SWATBurb

    2500SWATBurb Registered Member

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    1984 was first year for SF in 3/4 Tons..
     
  6. AV8

    AV8 Registered Member

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    Well, my 83 Suburban has a 14sf. I think they mixed them up a little back then, I've seen some with FF and some with SF.
     
  7. 2500SWATBurb

    2500SWATBurb Registered Member

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    For Suburbans anyway. Not sure about any other applications.
     
  8. 2500SWATBurb

    2500SWATBurb Registered Member

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    What kind of truck is your 83?
     
  9. AV8

    AV8 Registered Member

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    It is a Suburban.
     
  10. 2500SWATBurb

    2500SWATBurb Registered Member

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    Shows how much I know! :doah:

    What part of NC are you from?
     
  11. AV8

    AV8 Registered Member

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    I'm in Winston Salem....you?
     
  12. 2500SWATBurb

    2500SWATBurb Registered Member

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    Near Asheville
     
  13. u2slow

    u2slow 1/2 ton status

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    I agree with '81, and bigblock... but my '84 C20 Burb w/diesel had a 14SF stock.
     
    Last edited: Jan 3, 2006
  14. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    i though the 2wd diesels got the ff, but i could be wrong on that part. i know the BBC got the ff
     
  15. fireplug

    fireplug 1/2 ton status

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    Subs never came with a 14bff only one ton trucks did. 1/2 tons had 10 bolts, maybe 12bolts at some point in production others will know better. 3/4 ton had 14bsf.

    Right?
     
  16. mrhoes

    mrhoes 1/2 ton status

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    all I know is that in 3/4 tons they switched them back and forth, some had the SF and some had the FF. just look and then you will be 100% sure.
     
  17. dyeager535

    dyeager535 1 ton status Premium Member

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    I'm sure it was based on the GVW, just like '88+ 3/4 ton pick ups.
     
  18. u2slow

    u2slow 1/2 ton status

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    Nope. Assuming 81-91 context... 3/4-ton Subs used the 14bFF with the 454, otherwise the 14bsf.

    Here's the '81 pickup spec sheet:
    http://brochures.slosh.com/1981/pickups20.jpg
     
  19. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    Ditto, a neighbor has a 94 with a FF, big block
     

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