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new suspension idea

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Crusarius, Apr 9, 2002.

  1. Crusarius

    Crusarius 1/2 ton status

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    I was out wheeling sunday and I came acrossed a jeep with this suspension under it. its pretty ingenious I dunno where he found it but I am looking into putting it in my jeep when I do the axle swap.

    what I am looking for is any feedback as to why it will fail or why I should not do it, its pretty ingenious and looks prety durable the way it is designed

    www.rockmodified.com/suspension/PICT0587.JPG
    www.rockmodified.com/suspension/PICT0588.JPG
    www.rockmodified.com/suspension/PICT0589.JPG
    www.rockmodified.com/suspension/PICT0590.JPG
    www.rockmodified.com/suspension/PICT0591.JPG
     
  2. BozoWise

    BozoWise 1/2 ton status

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    Lots of flex but I wouldnt trust it on the highway.
     
  3. Crusarius

    Crusarius 1/2 ton status

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    the whole rear end is basically held in by 1 johnny joint but there is a trac bar holding the axle laterally I can see where it would be squirrely on the street wonder if stiff shocks would make it bearable
     
  4. m j

    m j 1/2 ton status

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    called a torque arm or torque tube suspension.
    Unimogs use that style
    I think Ford used it on the Model T and other cars
    nothing 'new' about it
     
  5. 87GMC

    87GMC 1/2 ton status

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    Didn't the late 60's chevy 2wd use the same thing?
     
  6. 87GMC

    87GMC 1/2 ton status

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    Didn't the late 60's chevy 2wd use the same thing, but with two arms?
     
  7. m j

    m j 1/2 ton status

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    no, they used 2 arms with seperate pivot points on the frame
    to 'articulate' the arms had to bend a bit.
    this style is limited only by the range of motion of the front mount and shocks.
     
  8. marv_springer

    marv_springer 1/2 ton status

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    Keith,

    Looks like that thing would really provide for a lot of movement!....

    Depending on 1 Johnny joint to take up ALL the forces that the rear end sends to the frame is what would scare me. I'm not sure that you could build that "A" arm out of "tough enough" steel to hold up, and if you did - I'd hate to see the weight of it!..

    But it is an interesting design.

    Marv
     
  9. DesertDueler

    DesertDueler 1/2 ton status

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    Its a big locating bar. You use that same setup in drag racing, but with a 4 link setup. What it does with the 4 link setup is it keeps the axle center so you launch straight. It works really good for drag racing, but you have 8 more joints holding it in place. I would also run longer springs, or run a limiting stap in between the springs so they dont fall out.
     
  10. Doug Miller

    Doug Miller Newbie

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    that is a similar rear suspension as nascar uses.
    lots of names for it. Trailing arm is one of them I believe.

    It makes the roll center pretty low, good for Nascar, but means your jeep would lean a lot in corners heading down the highway.
    As someone else posted, the front pivot better be really strong the way that guy did it.

    Also, you have to do something to locate the rear suspension left/right, which has to be a panhard bar or watkins link.
    Also, it is pretty important that the arms going forward end up just about as long as the centerline of axles to the U-joint at back of t-case, or the driveline will end up being a loaded suspension member in bind for a short period of time.

    -doug miller
     
  11. Michael

    Michael 1/2 ton status

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    Very scary!
     
  12. m j

    m j 1/2 ton status

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    no it isnt a big locating bar like in drag racing
    the wishbone locator in dragracing is spun the other way, frame 2 points- axle 1 point
     
  13. m j

    m j 1/2 ton status

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    last I knew Nascrap used 'truck arm' suspension.
    completely different then the torque tube
     

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