If you were my right front shock...why would you break?

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by biker, Sep 12, 2021.

  1. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    I’m still not sure how a shock “bottoming out” would break the rod on the top unless there was some sideways movement too.

    Shock rods are very hard but they can be broken if you bend them sideways.
    (I’ve used that fact to remove stubborn ones with a rounded nut on top.)

    Possibly a stress crack from when it was manufactured and threaded?
     
  2. biker

    biker Veteran Member

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    I got thinking about that today as well while swapping out the rad on a giant Detroit Diesel.
    If the shock rod only operates in a strictly linear plane, I would think the shock body would blow out long before the rod breaks. Maybe there is a slight shearing that takes place under full bind. Wouldn't take much for a hardened rod to bust when subjected to force in a plane it wasn't designed to withstand.
     
  3. carr911

    carr911 Veteran Member

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    Bilsteins are Warrantied for Life ( Original Purchaser)
     
  4. biker

    biker Veteran Member

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    Thanks man!
     
  5. Ratty_81

    Ratty_81 Veteran Member

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    Definitely a bending stress component there. Not much, but it's there. The lower control arm travels through an arc so it puts a bending load into the shock as it travels. The dog bone on the bottom "should" aleviate most of it, but if it's seized or binding it could cause more bending. I'm guessing it snapped off where the threaded portion is friction welded to the shaft?
     
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  6. biker

    biker Veteran Member

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    Yep, exactly the place it snapped. I will post a pic shortly
     
  7. G72Zed

    G72Zed Veteran Member

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    I stand by my post (#2) and fully agree with Ratty_81 post.

    And one of the reasons why conical 1/2 breed coil over front shocks had issues.
     
  8. Lowend

    Lowend Administrator. .a car, a man, a maraca. Staff Member Lifetime Gold Member

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    For a time Hotchkis was contracting Bilstien to build them shocks specifically to use with the TVS kit. You couldn't buy the PN directly from Bilstein. They have since switched to Fox
     
  9. biker

    biker Veteran Member

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    Yes. At the time I bought the Bilsteins, my thinking was along those lines. They must have similar calving, and they did work well for a while.
    Anyways, I called Hotchkis and they said any shock they sell will work safely with up to 2" drop.
     
  10. biker

    biker Veteran Member

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    Just pulled the trigger on 4 Hotchkis (Fox) rebound adjustable gas shocks.
     

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