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hybrid joint?

Discussion in 'The Garage' started by TXsizeK5, Feb 20, 2003.

  1. TXsizeK5

    TXsizeK5 1/2 ton status

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    Where can I get a hyrbid joint to connect my shaft with the new 14bolt im throwin in? What are the "numbers" for the two diff ujoints again? Does ORD, Echobit, or A-tron or Offcamber 4x4 sell this hybrid joint?
     
  2. Hossbaby50

    Hossbaby50 3/4 ton status

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    The joint I used was Napa #447.

    It is a 1310-1350 hybrid I believe.
     
  3. chulisohombre

    chulisohombre 1/2 ton status

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    hoss was correct it is a 1310 1350 joint.it is neapco part number 3-3140.that would be the number to cross refference at the parts stores.
     
  4. 77 Mud Buddy

    77 Mud Buddy 1/2 ton status

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    I fellow K5 guy and I bought the Napa p/n 447 u-joints for our 1/2 ton ( 1310 ) yoke drive shaft to one ton ( 1350 ) yoke rear axle swap /forums/images/graemlins/grin.gif.... They didnt work /forums/images/graemlins/angryfire.gif. The 447 joint caps measure in at 1.18" on the (1350) one ton side and 1.125" on the (1310) 1/2 ton side. THE ( 1310 ) 1/2 TON SIDE DID NOT FIT /forums/images/graemlins/confused.gif. I later measured my 1310 yoke at 1.065" and my 1350 yoke at 1.18"

    I called NAPA and found the part number I needed for the size I measured. From what I know now I need either part number 348 ($27.50) or 448 ($26.50). The difference between the two I do not know yet /forums/images/graemlins/confused.gif, I am thinking greasable or non-greasable. Both of these u-joint caps measure correctly at 1.18" x 1.063" and are outer type caps. I will know soon if these work or not but what I do know is the 447's did not work for me or my fiend in our application /forums/images/graemlins/frown.gif.

    /forums/images/graemlins/deal.gifI have a 77 K5 which had a 12 bolt and I am putting in a 14 bolt FF in from a 73 3/4 ton truck.

    /forums/images/graemlins/deal.gifMy friend has an 83 K5 which has a 10 bolt and he is installing a 2000 14 bolt SF. ( I think his info is right )

    Hope this helps somebody ! /forums/images/graemlins/thumb.gif /forums/images/graemlins/k5.gif
     
  5. 77 Mud Buddy

    77 Mud Buddy 1/2 ton status

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    it looks like the difference in the 348 and 448 are the width of the 1.063 caps ( 1/2 ton / 1310 ). One is wider than the other but I dont know which one is for my application... Need to do a little more research!
    /forums/images/graemlins/pimp1.gif
     
  6. heavy4x4

    heavy4x4 1/2 ton status

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    Here's my understanding:

    The Napa PN 447 is a 1330-1350 combo joint used in going from a 10 bolt to a 14 bolt.
    The Napa PN 348 is a 1310-1350 combo joint used when going from 12 bolt to 14 bolt.

    The 1330 and 1310 use the same size caps, but the width of the joint is different. The 1310 joint (the 12 bolt joint) is smaller in width than the 1330 (10 bolt joint).
     
  7. rock.monkey

    rock.monkey 1/2 ton status

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    Funny thing is when I installed my 14ff (1973) in to my 88 Jimmy with 10 bolts, I was able to use the original stock u-joint, what's up with that?
     
  8. heavy4x4

    heavy4x4 1/2 ton status

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    Someone before you must have swapped the 14 bolt FF yoke out to a 1330 /forums/images/graemlins/crazy.gif /forums/images/graemlins/crazy.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/thumb.gif
     

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