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14 bolt question

Discussion in 'The Garage' started by onlychevy6, Mar 20, 2006.

?

Which 14 Bolt is better

  1. 73 - 85 14 bolt FF

    54.2%
  2. 86 to present 14 bolt FF

    29.2%
  3. Don't know Don't Care

    16.7%
  1. onlychevy6

    onlychevy6 1/2 ton status

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    So which is the better 14 bolt? 73-85 or the 86 to present?
     
  2. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    There's a major difference?

    As long is it's a FF 14, it don't matter, although, I think the older ones are still easier for the swap in...
     
  3. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Id say the later style. It has bigger pinion bearings. Also 96 and newer has a different pinion seal, fot those who care. But in reality, they are both great!!!:waytogo: :waytogo:
     
  4. tarussell

    tarussell 1/2 ton status

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    Are you talking about the housing ribbing differences or just the pinion bearing support differences ?

    Tom
     
  5. muddybuddy

    muddybuddy 3/4 ton status

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    no nekked option???? come on!

    ive got a '76 14b and its fine for me. i just put in all new seals bearrings, and gears so its basically brand new
     
  6. onlychevy6

    onlychevy6 1/2 ton status

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    Actually. I was reading some informationon the 14 bolt ff. I currently have 12 bolt with dana 44 6 lug.

    and the article was saying 73-85 14 bolt had smaller pinion support bearing and the drums are held to the hub with the wheel studs versus the 86 to present has a larger pinion and the drum could be pulled without having to remove the hub and axle shaft.

    I thought the FF design the axle shaft was seperate all together? And could be pulled without taking everything apart. kinda like a SF.
     
  7. onlychevy6

    onlychevy6 1/2 ton status

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    Damn my bad...
     
  8. cbbr

    cbbr 1 ton status GMOTM Winner

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    Petersons, right? I read the same thing, which is great by me as mine is an '86.
     
  9. tarussell

    tarussell 1/2 ton status

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    The shaft on a full floating axle does come out seperate from the hub/drum combo but some 14FF have the drum that is on the outside of the hub ( as in slides over the wheel studs ) and can be removed without the hub being removed as well. The older style has the drum pinched between the wheel studs and the hubs so in order to get the drum off the hub needs to be removed also.

    I do not believe that 1986 is the cut off year for the drum being on the outside of the hub . I believe it was 1988 when the new body style came out and the old body style trucks still used the old drum method until 1991. So it is possible to have two of the same year 14FF with different drum retention it just depends on what it came out of .

    Or I should say it like this - All solid axle style trucks used the old drum retaining method and all newer independant style trucks use the slide on drums. This is accurate to the best of my knowledge but I could have left out some exception to tyhe rule ......

    HTH's Tom
     
  10. onlychevy6

    onlychevy6 1/2 ton status

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    yup
     
  11. muddybuddy

    muddybuddy 3/4 ton status

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    :haha: no worries
     
  12. Leper

    Leper 1/2 ton status

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    There is a cutoff year that makes the disc swap different. I don't know what year though.
     
  13. Masiony

    Masiony 1/2 ton status

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    mine was out of a (85?) CUCV. it had a lightly different housing than i have ever seen. it had more material around that huge lip. i wasnt able to get as much ground clearance when i shaved it.
    [​IMG]



    [​IMG]
     
  14. b454rat

    b454rat 1/2 ton status Premium Member

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    The axle in my 89 is out of a 92 or 93, it has slip on drums. But the rear in my 97 has pressed on drums. I've seen some other 14ffs, and from what I noticed it depends on what rating the truck is. The 89 14ff rear was a 3/4 ton, while my 97 is a 2500HD so I guess you could say a 1 ton. Saw a truck in a yard that had a 454 4l80, 3/4 ton that has the pressed drums.
     
  15. BIG*RED

    BIG*RED 1/2 ton status

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    yeah i read that to do the disc swap on the newer 14bltff required replacing somthing, where as on the older ones you didn't have to....but for the life of me i can't remember what it was
     
  16. b454rat

    b454rat 1/2 ton status Premium Member

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    One reason is there is no room. There is just enought room to hold on to a wrench to bleed the brakes. Discs on these puts the caliper in a different location than the older ones....
    [​IMG]
     
  17. tarussell

    tarussell 1/2 ton status

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    Oop's ! I guess I should not have said that ALL newer style trucks have slide on rear drums. Learn something new everyday ........
    Tom
     
  18. hack500

    hack500 1/2 ton status

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    could the '97 have been an AAM 11.5 instead of a GM 10.5?
     
  19. b454rat

    b454rat 1/2 ton status Premium Member

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    No, it's a 14ff. The AAM's didn't come out till the later HDs.
     
  20. onetonbb74

    onetonbb74 1/2 ton status

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    the best one for me was the 73-85 3/4 ton because it fits in my 3/4 ton truck and blazers with no probs. I have no idea what year mine is but it bolted in so i guess i never really payed attention. I wouldn't get one too old as the spindles could be hammered or the mileage could be high. I swapped my stock 14 bolt because the truck had 378,000 miles of construction miles on it, multiple helicoils in the hubs, hammered spindle on one side, needed brakes, and it was 3.73 so it all depends on the condition to me.
     

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