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Technical Front suspension question

Discussion in 'Traditional Hot Rods' started by Hack Magoo, Apr 21, 2026 at 10:04 AM.

  1. Hack Magoo
    Joined: Aug 1, 2025
    Posts: 5

    Hack Magoo

    Hey guys looking for some input on this type of suspension setup. I saw this truck for sale on FB, and the owner doesn't know anything about the setup. I've seen this done a couple other times a few different ways. I would like to do something similar, as I'm not crazy about radius rods. So was wondering if anybody has done a setup like this, what's it even called, how does it ride, and so forth. Thanks for any input.
     

    Attached Files:

  2. willymakeit
    Joined: Apr 13, 2009
    Posts: 1,439

    willymakeit
    Member

    Appears to be quarter ellptic.
    Works well, like any thing. I have a more modern version on 2 cars.
     
  3. Hack Magoo
    Joined: Aug 1, 2025
    Posts: 5

    Hack Magoo

    Willy it's not 1/4 elliptical the spring is in front of the axle. I'm more referring to the square tubes being used in place of radius rods.
     
  4. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,586

    gimpyshotrods
    ALLIANCE MEMBER

    What you have in these pictures is functionally a forward facing swingarm.

    It will have little to no articulation.
     
    bchctybob, Clydesdale and Hack Magoo like this.
  5. Hack Magoo
    Joined: Aug 1, 2025
    Posts: 5

    Hack Magoo


    Thanks Gimpy. So, it would basically ride like a tank?
     
  6. Clydesdale
    Joined: Jun 22, 2021
    Posts: 464

    Clydesdale
    Member

    What an abomination!
    Are those giant tubes on the back to hold brooms so you can sweep up the wreckage when it understeers into a kerb??!! :eek:
     
  7. Relic Stew
    Joined: Apr 17, 2005
    Posts: 1,247

    Relic Stew
    Member
    from Wisconsin

    It's still radius rods, just square tube instead of hairpins or split wishbone.
    Looks like a parallel leaf axle, so tube was the easiest thing to attach.
     
    Hack Magoo likes this.
  8. RICH B
    Joined: Feb 7, 2007
    Posts: 6,162

    RICH B
    ALLIANCE MEMBER

    Pretty much like the typical I-beam/split wishbone front suspension other than the truck axle won't flex as easily as a regular early Ford axle; so I would say it would ride a little tougher on uneven roads. The big square wishbones are functional; but pretty clunky. I would look real close at the welding on that rig anywhere changes were made or components fabricated.
     
  9. woodiewagon46
    Joined: Mar 14, 2013
    Posts: 2,573

    woodiewagon46
    Member
    from New York

    What it looks like to me is that the previous owner is using the spring mounts on an axle that was set up as a parallel sprung axle as the radius rod attachment points. If you are happy with the setup you can always "clean it up" with different ways to attach wishbones or a split wishbone setup. Can we get more pictures?
     
  10. bchctybob
    Joined: Sep 18, 2011
    Posts: 6,311

    bchctybob
    Member

    Those two “radius rods”are u-bolted solidly onto the axle close together. For one wheel to rise while the other stays put, that fat axle has to twist. That big axle, in that short section, isn’t going to want to twist. Basically it’s like parallel ladder bars on a rear end, it’ll go down the road but eventually something’s gonna crack or break. It’s definitely not a design that I would copy for my car.
     
  11. Hack Magoo
    Joined: Aug 1, 2025
    Posts: 5

    Hack Magoo

    I'm not looking to purchase this truck. I'm getting ready to start my own build. Just asking about the suspension. Thanks
     

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