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Open Knuckle, Closed Knuckle???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Biguub91, Dec 15, 2002.

  1. Biguub91

    Biguub91 Registered Member

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    What is the difference between open and closed knuckle noone has ever clarified this for me? How can you tell any info or links would be great.
     
  2. Bullet

    Bullet 1/2 ton status

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    An open knuckle design is the type of front axle where the U-joint's are clearly visible at the end of the axle tubes on the knuckle's. Every live axle today is a open knuckle design...A closed knuckle design is where you cannot see the U-joint; instead, you they are inclosed. These axles are not made anymore and can be found underneath old Power Wagons, Kaiser's and M-37 and 60's and later 4x4 trucks.
     
  3. Biguub91

    Biguub91 Registered Member

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    thanks alot it was alot simpler than i thought
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    When hunting for axle always look for 74 or newer. 73 and older D44's ran a smaller u-joint in the front at the knuckle.
     

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