Freightliner Cascadia 2018 Shimmy - Help

Discussion in 'Freightliner Forum' started by Gibraltar, Oct 20, 2020.

  1. Gibraltar

    Gibraltar Bobtail Member

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    Apr 25, 2017
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    Hello friends,

    After running 500,000 - it was finally time to change all my tires. Instead of going with Michelin, I got two firestones steer tires and cheap chinese tires for the rear.

    I have done literally everything. Balanced them, aligned them from Kal Tire. I’ve paid 7 hours of inspection at the dealership to find out why my front end is shaking. I’ve changed all my shocks. And yet - the truck goes all over the road at the smallest of bumps. Whether it’s with a loaded trailer or empty or bobtail - if I’m not careful, it will travel into the other lane. And I’ve also installed new stabilizer bars.

    I’m now contemplating selling all these tires and getting proper Michelin tires. But before I make this decision. Is there *anything* you think I could still ask my mechanic to check? King pin, all of that stuff is fine too.

    This all started after I got the steers changed from Michelin to Firestones. Should I just get the steer tires changed and test it out? Or should I take all of them off and get Michelin all around? Any tip, anything you can think of, please feel free to make your suggestions.

    Thank you
     
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  3. Gibraltar

    Gibraltar Bobtail Member

    36
    17
    Apr 25, 2017
    0
    Vibration in steering wheel at 45 mph to 55. Lessens after that. Bumpy ride. Constantly having to keep vehicle straight. Ride feels very unstable. It’s the worst on uneven roads. Changing lanes is the worst. It’s like the wheels have a mind of their own.
     
    Last edited: Oct 20, 2020
  4. Milr72

    Milr72 Medium Load Member

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    Dec 16, 2011
    S W Missouri
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    I think that's your problem! Good tires aren't cheap and cheap tires aren't good! That's my opinion and I'm sticking to it!
     
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  5. 401-Alex

    401-Alex Light Load Member

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    Nov 25, 2013
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    I bought my volvo truck its an 05. Drove like a bowl of jello when i bought it. Put some kelly steer tires on it and had a shake always. Since that time i have replaced the front axle as kingpins were wiped and part of the axle. That stopped the jelly ride did not stop the shake. Have Yokohama ry steers and centramatics and great ride. Point of this is cheap ####ty tires give a bad ride. I have a shake in the rear of the truck and i have kelly tires on it too so i know where its coming from
     
    Gibraltar Thanks this.
  6. Gibraltar

    Gibraltar Bobtail Member

    36
    17
    Apr 25, 2017
    0
    Update: tires changed to Michelin. Alignment done. Balance done. Still vibrating. Mechanic found two issues. One front wheel bearing had a slight play. Fixed. Now working on something yoke? transmission maybe? Says there is play there. Tightening that bolt.
    Mechanic says everything else is fine. If problem still persists then take it to freightliner and get transmission diagnosed. See if it’s an internal issue.
     
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