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14 bolt help?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 78 k5, Sep 5, 2004.

  1. 78 k5

    78 k5 1/2 ton status

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    My stock K5 driveshaft won't match up with my new 14bff. What is the U-joint on my driveshaft (1310/1350/1410??) and what is the Pinion yoke on my 14bolt??? How do I fix this problem?
     
  2. TX Mudder

    TX Mudder 1/2 ton status

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    Your driveshaft is 1310. Your axle is 1350.

    There is a conversion ujoint. I do not know the part number, but someone else will and you can get it from NAPA.

    A better choice would be to upgrade your driveshaft to 1350.
     
  3. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Napa/Precision PN 348

    Neapco PN 3-3140
     
  4. 78 k5

    78 k5 1/2 ton status

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    Does it matter that its out of a 3/4 ton? Or is it still 1350?
     
  5. 6.2puller

    6.2puller 1/2 ton status

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    Just an FYI some 10bolts did have the 1350 yoke on them. My 83 6.2l had a 1350 on the 10 bolt so the driveshaft was all set on my 14bolt swap with no ujoint change or conversion joint.

    My 14 bolt was from a 3/4 ton 73K20.
    Don't ask me why they put such a large ujoint on such a small axle /forums/images/graemlins/dunno.gif
     
  6. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    I have never seen or heard of a 1350 on a 10 bolt but they did use 1330.
     
  7. stallion85

    stallion85 1/2 ton status

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    [ QUOTE ]
    I have never seen or heard of a 1350 on a 10 bolt but they did use 1330.

    [/ QUOTE ]

    Some 80's model K5 stock with sm465's came with 1350's in the rear driveshaft. Mine did.
     

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