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conversion u-joint

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by tom, Jan 6, 2001.

  1. tom

    tom 1/2 ton status

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    My blazer needs a repalcement for the u-joint at the rear differential, but I can't find the part.
    This is a conversion type joint. One set of trunion caps is 1.125" dia. and the other set is 1.187"dia (on the same u-joint). The distance across trunions is 3.625 with the caps in place.
    The Blazer is a '91, SM465/NP241 with a 10 bolt rear axle.
    Any suggestions on how I identify this part and where to buy one? I live in southern california.
    Thanks, Tom
     
  2. k5king

    k5king 1/2 ton status

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    hey,,check out a local auto parts store... i have bought them from napa,,summit may also have them

    ANYBODY LOSE THEIR JEEP????????[​IMG]
    I JUST FOUND ONE UNDER MY BLAZER!!!![​IMG]
    [​IMG][​IMG]
     
  3. Russell Keys

    Russell Keys 1/2 ton status

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    Try to find a parts store where the guys know how to use a book. More than likely it won't be an app. in the computer for a specialty u-joint. I used to work for NAPA so I'm sorta partial to them. But the book we used to use had a special section for conversion u-joints. If it is a direct replacement then ther shouldn't be a problem getting one. If the axle, or d-shaft is diff. then if you know the 2 applications they can look the 2 part#'s up and use the chart to get a good # for the u-joint you need. Hope this helps-Russell
     
  4. tom

    tom 1/2 ton status

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    Thanks Russsel; Took your advice and drove to the NAPA store. The guy knew how to use the book and had the correct U-joint on the shelf. If anybody else has this combo, (think it is a 1350 type on the driveshaft and a 10 bolt diff yoke), the NAPA part number is NUJ.447. By the way, Auto Zone, Kragen, Pep Boys - none of them could identify the right part.
     
  5. HarryH3

    HarryH3 1 ton status Author

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    Sadly, most parts stores these days are useless for anything beyond stock part applications. Try finding leaf spring center bolts. NAPA's the only place I found that carries them. The counter help at Pep Boys and Auto Zone looked at me like I had asked them how to build my own space ship. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  6. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Tom, if you haven't found one yet call Tom Woods: 1-877-4XSHAFT or www.4xshaft.com. He is a great guy and has them in stock.

    Jim '80 GMC
    Freedom First!
    <A target="_blank" HREF=http://www.bigjbear.coloradok5.com>http://www.bigjbear.coloradok5.com</A>
     
  7. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

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    try this, NEAPCO is the company, the part numbers are, 2-3011 or 2-3011BF, go with the BF that stands for brute force. Its the performance U-joint. make sure this part number is correct before ordering it. I had a bud of mine who works at NAPA look up the part number.......js
     

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