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Converting to 3/4 ton Is a new rear drive shaft needed

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

  1. cegusman

    cegusman 3/4 ton status

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    I just picked up a 3/4t dana 44, and a 3/4t 14 bolt FF, I now it is a direct swapin but am I going too have to get custom drive shafts made or are the ujoints the same as the 1/2t 10 bolts?

    Houston, TX
     
  2. BurbinOR

    BurbinOR 3/4 ton status

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    Re: Converting to 3/4 ton

    The front should be a direct match for your u-joint......the rear will take one of two choices of ujoints. My '79 needed Napa ujoint #348 (as did Mudhog's '77) to hook up to the 14B, if that doesn't work the Napa #447 is the one. The later Blazers (not sure which year) takes the 447..........

    <font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.rockcrawler.com>www.blazzinor.rockcrawler.com</a>
     
  3. greg83k5

    greg83k5 1/2 ton status

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    Re: Converting to 3/4 ton

    somebody told me 83 and later takes the #447, which i picked up today at o'reilleys for 27 dollars....

    where'd you score your axles at in houston? i have to get the 3/4 ton hubs and backing plates....
     
  4. cegusman

    cegusman 3/4 ton status

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    Re: Converting to 3/4 ton

    Do I have to get a new rear drive shaft? I picked up my axles form a coloradok5 user in Collage Station.

    Houston, TX
     
  5. Zepplin

    Zepplin 1/2 ton status

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    Re: Converting to 3/4 ton

    When I put my 14bolt ff under my 74, with a NP203, I only had to buy the new hybrid U-joint. The 14 bolt will actually need a shorter driveshaft maybe a 1/2" or 3/4" or so. But, I already had a slip-style driveshaft so I was good to go.

    74 Blazer
    Zepplin
    Check out my Blazer
    <a target="_blank" href=http://community.webshots.com/user/zepplin1976>http://community.webshots.com/user/zepplin1976</a>
     

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