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axle swap ?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by lugnut, Aug 7, 2001.

  1. lugnut

    lugnut 1/2 ton status

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    The 12 bolt in my sub. is getting tired so axle swap ideas are rolling around in head.It is a 78 1/2 ton 4x4. Were the spring perchs etc. the same on the 3/4 ton if so for what years? Thanks in advance for your help.
     
  2. Kyle89K5

    Kyle89K5 1/2 ton status

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    Pretty much all years, 73-87

    I took a rearend out of a 74 3/4 ton and slapped it in my 89 no probs.

    You run into some snags MAYBE with the way the e-brake hooks up, but thats about it. I'm not sure on that one, I don't run an e-brake.

    Kyle
    89K5
     
  3. Rockjunkies

    Rockjunkies 1/2 ton status

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    Watch out for different u-joint sizes!

    Keep it simple!
     
  4. LittleJimmy

    LittleJimmy 1/2 ton status

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    Most parts stores like Napa or Track or Aout zone will have the right U-Joints. Just make sure you remember what year truck the axles come out of so you can get the right one....
     
  5. lugnut

    lugnut 1/2 ton status

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    Thanks now that I know what fits I can way the price of rebulding vs replacing.
     
  6. What part of NC are you from? I've got a 14 bolt 4.10 geared, locked ready to bolt in for ya.
    If not DERF00 has a 12 bolt ready to bolt in with 3.73 posi all newly rebuilt!!!!

    Damn I need to learn how to use my welder!![​IMG]
    (90 Jimmy 350 TBI, 3/4 conversion in progress!!!
    (ftn96)
     
  7. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Hey Mud,
    You dealing with the split personality syndrom? You were xxx yesterday (don't want to blow your cover... LOL).

    Dave

    Saw It... Wanted It... Had A Fit... Got It
    91 K5 - in the process of 4" lift with D60/14FF plus LOTS of extras. ETF August 1.
     
  8. LOL!!! Im wanting to go back to ftn96 cause I miss it now. But I paid for my membership under mud-weiser, So Im waiting till steve gets to me to discuss the transfer. [​IMG]

    Damn I need to learn how to use my welder!![​IMG]
    (90 Jimmy 350 TBI, 3/4 conversion in progress!!!
    (ftn96)
     
  9. bigk

    bigk 1/2 ton status

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    Here's a tip you should definitely follow after you do the swap and install the 2-way u-joint. Keep the u-joint box or write down the part number somewhere you can easily find it. When I shucked mine and had to replace it you should have seen the stupid looks I got from the guy at Auto Zone. He still gave me the wrong part after what seemed like a half hour of research.

    Karl
    Temporarily Unemployed Underwear Model
    87 3/4 ton
     
  10. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Autozone got me the right one but now they can't get them for me anymore.

    I have a Napa one in it now.

    Axles from an '82 K20 are under mine.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  11. Becton

    Becton Newbie

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    The u-joint is Napa pn#447 for 1/2-ton driveshaft to 3/4-ton 14bolt. -Beck.

    81K5.350.350.208.D44.14B.
     
  12. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Yes, I know this. It took three tries to get the right one. My mom tried twice, and it didn't work, so I sent my friend's girlfriend up there. She had a really low cut shirt on, she's 20 years old, and she fills up the shirt quite nicely. She came back with the #447 for me. I don't know how she did it, but she did.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  13. dragricinMT

    dragricinMT 1/2 ton status

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    I am an asst. manager at a NAPA store, if you forget the part # of the u-joint just tell them you are using the 1/2ton driveshaft and 3/4ton diff. They can then look up both u-joints and then find the combo joint with those part #'s.
    By the way, CK5 is awesome! Wish I had known about this a long time ago.
     
  14. lugnut

    lugnut 1/2 ton status

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    I am about 30 miles south of Burlington way back in the woods. After pricing axles I will probly rebuild mine.It has been good to me for about 100,000 miles. I will only have to pay for the parts. Thanks for all yalls replys.
     
  15. ftn96

    ftn96 1/2 ton status

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    Still here if you need us! I've got the 14 bolt laying in Nashville Tn should you change your mind!

    Does anyone have a grinding disk I can borrow?[​IMG]3/4 in progress[​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     

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