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Whats the difference between open and closed knuckle D44's?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 85scottsdale, Jan 6, 2004.

  1. 85scottsdale

    85scottsdale 1/2 ton status

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    Whats the difference between open and closed knuckle D44\'s?

    I need some educatin', i'm curious to know the difference between a open and closed knuckle Dana 44 of the half-ton variety.
     
  2. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Re: Whats the difference between open and closed knuckle D44\'s?

    I don't know much about a closed nuckle 44 but I do know that the open style knuckles are stronger and easier to take apart. Plus you can see the u-joint.

    One thing with heavy farm equipment is that on planetary axles (4 or 5 ton, and closed knuckle) the axle tube will crack at the nuckle when they have a constant heavy load on them sometimes.
     
  3. Muddytazz

    Muddytazz 1 ton status

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    Re: Whats the difference between open and closed knuckle D44\'s?

    Closed knuckle, not the ball socket like joint(axle joint is included), this is the weaker knuckle.
    [​IMG]

    Open knuckle, axle joint is open, much stronger knuckle:
    [​IMG]
     
  4. Hardcore

    Hardcore 1/2 ton status

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    Re: Whats the difference between open and closed knuckle D44\'s?

    Closed knuckles have fluid in them to lubricate the joint. They are prone to leaking which leads to failure. Stay away from them. /forums/images/graemlins/tongue.gif
     
  5. imiceman44

    imiceman44 1 ton status

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    Re: Whats the difference between open and closed knuckle D44\'s?

    [ QUOTE ]
    I need some educatin', i'm curious to know the difference between a open and closed knuckle Dana 44 of the half-ton variety.

    [/ QUOTE ]

    These are 2 good point the guys gave but the most important issue is the closed knuckle axle has less room inside so they use smaller joints which are weaker.
    /forums/images/graemlins/thumb.gif
     
  6. R72K5

    R72K5 Banned

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    Re: Whats the difference between open and closed knuckle D44\'s?

    '70 was changeover year over to open knuckle btw, some 70 are open and some were still closed, hit and miss, 70 was also the year the axles widened under GM trucks blazers burbs
     
  7. 85scottsdale

    85scottsdale 1/2 ton status

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    Re: Whats the difference between open and closed knuckle D44\'s?

    Great! Thanks for the info guys, i'm am not a little more educated!
     
  8. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Re: Whats the difference between open and closed knuckle D44\'s?

    [ QUOTE ]
    Great! Thanks for the info guys, i'm am a little more educated!

    [/ QUOTE ]
    That is what is so great about this site and all these guys!
    There is so much knowledge that can be gained here that it can make your head spin and smoke pour out your ears. /forums/images/graemlins/thumb.gif
     
  9. Muddytazz

    Muddytazz 1 ton status

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    Re: Whats the difference between open and closed knuckle D44\'s?

    [ QUOTE ]
    There is so much knowledge that can be gained here that it can make your head spin and smoke pour out your ears. /forums/images/graemlins/thumb.gif

    [/ QUOTE ]
    I lost my ears a long time ago from the smoke pouring out /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif
     

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