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Axles swapped U-joint and Driveline questions

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by SummitXMK, Dec 10, 2001.

  1. SummitXMK

    SummitXMK 1/2 ton status

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    I have a stock 1978 Chevrolet Blazer. I Swapped in a set of axles from a 1976 Suburban Dana 44 front 12 bolt rear. I went from 2.76 to 3.73. I have a vibration that I am pretty sure comes from the front driveline. (When I remove it it seems to go away. I am going to start buy replacing the ujoints. I want to replace them all. My questions are, First will I need a different u-joints? The dana 44 from the 76 is the first style so the steering stabilizer mounts differently. And the yoke needed a different type of bolting system. There rear axles seamed mounted exactly the same. Secondly could my angles have changed. Both trucks were stock so I figured they wouldn't but now I am curious. Thanks for your help guys I really appreciate(sp) it.

    78 K5 Cheyenne 400 th350 203 With lots of miles
     
  2. SummitXMK

    SummitXMK 1/2 ton status

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    I forgot to mention that the Suburban was stock also. It had a 400 th350 203 Set up.

    Thanks again for any help.

    SummitXMK

    78 K5 Cheyenne 400 th350 203 With lots of miles
     
  3. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    You went from a D44 to a D44 in the front?

    Check the pinion nut and make sure it is tight.

    Dave

    Horn Broken... Watch For Finger.
    <a target="_blank" href=http://coloradok5.com/gallery/Daves-Pics>http://coloradok5.com/gallery/Daves-Pics</a>
     
  4. SummitXMK

    SummitXMK 1/2 ton status

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    Yes I went from a dana 44 to a dana 44. DO you know what the torque of the pinion nut should be?

    78 K5 Cheyenne 400 th350 203 With lots of miles
     
  5. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Nope. Sorry. Someone here will get it for you.

    Recently I had a slight vibe that was hard to find - turned out to be a worn out yoke. Maybe swap and torque yokes? If they are the same. I dont't know the D44 and definately not the different types. Do they look the same? A longer pinion/housing will change your DL angle.

    So you ONLY did an axle swap and that was same'o diffs..... Hmmmmm. Maybe there are some other subtle differences.

    Dave

    Horn Broken... Watch For Finger.
    <a target="_blank" href=http://coloradok5.com/gallery/Daves-Pics>http://coloradok5.com/gallery/Daves-Pics</a>
     

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