leaf spring shackle bushings

Discussion in 'Peterbilt Forum' started by rhitrucking, Jun 24, 2020.

  1. rhitrucking

    rhitrucking Light Load Member

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    So my Pete rides extremely rough on the front. I am trying to determine if my shackle bushings are junk. I measure the angle of the shackles when truck is resting, then jack up one side until tire is about 2" off the ground, angle doesn't change. Repeat on other side and exact same scenario. I would think the leaf should flatten atleast a little bit???
     
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  3. bad-luck

    bad-luck Road Train Member

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    Can you post any pictures? Is the distance between both the pins on the rear of the spring the same? The leaf's only flatten out when they are worn out. The bushings wear out and there becomes excessive play.
     
  4. MM71

    MM71 Medium Load Member

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    Worn bushings usually make creaking and popping noises when turning at low speeds, especially while backing.

    How many miles? If you are replacing bushings ... it is only a few bucks more, and much much easier, to just buy spring packs. Replace the pins and shackles if you are over a million while you are at it.
     
  5. rhitrucking

    rhitrucking Light Load Member

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    I am getting no weird noises, just a crazy rough ride, I would feel a mouse if I ran over it. I assumed if jacking up one side the leaf would compress some causing the shackle to move. I am concerned that the shackles are no longer pivoting when the leaf compresses while driving. My bushings are not greaseable either.
     
  6. bad-luck

    bad-luck Road Train Member

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    Ok, if the bushings are not greaseable they are solid rubber. They may be worn, check your shocks, king pins. As I mentioned before, is the difference between the rear pins the same on both sides?
     
  7. rhitrucking

    rhitrucking Light Load Member

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    shocks are brand new. distance between shackle bolts is the same on both sides. 3 3/8" I just bought the truck recently. It feels way over sprung.
     
    Last edited: Jun 24, 2020
  8. bad-luck

    bad-luck Road Train Member

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    Ok, check at the edges of the pins for wear. But the side to side wear would not effect the ride, you would feel it in the wheel while turning and hear a banging or popping. I know you said it's not doing it. Check for broken springs, missing shims, loose u bolts. Check the king pins next. Get a bottle jack and jack up one side at a time. Use a bar to lift up tire and check for up and down play. Push in the top of the tire in towards the frame to check for side to side play. Are your stear tires wearing evenly?
     
  9. bad-luck

    bad-luck Road Train Member

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    Forgot to mention cab bushings. They will effect the ride
     
  10. rhitrucking

    rhitrucking Light Load Member

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    steers are wearing great. I checked the king pins when I bought the truck 3 months ago and all were good. Been chasing this rough ride issue. I feel the truck is over sprung. I have owned 7 trucks, and this is BY FAR the worst riding. My next step was changing out the cab bushings, but I feel its way more than that. I wouldnt be surprised if my steers have left the ground at some point due to just normal bumps on the road.
     
  11. bad-luck

    bad-luck Road Train Member

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    Ok, could be. Are the springs the stock Springs? Maybe they were replaced with 14k ones. If you can find a part number, a local spring shop could tell you what you have
     
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