Bad ride/wobble/shake/tire ware

Discussion in 'Western Star Forum' started by Wstardan, Feb 10, 2022.

  1. Wstardan

    Wstardan Bobtail Member

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    Feb 10, 2022
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    9 months into owning a w star 4700SF Day cab (first owner op truck). Bought at 500,000km (Canadian here, sorry lol).

    Everything seamed good for first few thousand KM. Noticed a lite shake feeling in the seat. Decided to replace mis matched drive tires with Virgin hankook DL12's and At this time I replaced the outside steel rims with polished rims, and left the inside rims, the old steelies alone..other then 1 brand new steelie. Should note I had to get longer wheel studs to accommodate the aluminum rims. Still felt a shake in the seat coming from the rear (more noticeable now).
    Shake/wobble, feels like I'm running on Michigan roads when the pavement is smooth..

    I use a different trailer daily

    Can feel it more when running empty or up to 20k in the trailer, any heavier then 20k it seems to not be as noticeable but I can still feel it.
    Does it bobtail
    The feeling is always in the seat. Almost like a balance issue..

    Now this is what I've done in order with no success, still feels the same from day 1.

    Tires and rims (outsides)
    U joints
    4 rear shocks
    Both torque bars
    3 axle alignment
    Both drive shafts balanced.

    Would yall suggest $240 is worth it to balance the tires?
    Would driveshaft angle check help?

    Noticing the inner part of the tires on axle #3 are starting to cup/ware more then axle 2.

    I'm not a rich man, just trying to make it like everyone else. Between slow work and this very expensive problem, it has been extremely frustrating. I'm really hoping someone can lead me to a solution without having to spend $600 ever time I go to the mechanic on something that doesn't get fixed.

    Thanks, be safe
     
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  3. 07shaker

    07shaker Light Load Member

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    Jan 12, 2013
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    Those vibrations are a pain to chase down. The tires you went with are a good mid grade tire so I wouldn’t suspect them right away. If I’m reading it correctly the vibration stayed even when the tires were changed making me think that maybe one or several of your steel wheels are bent. If you can get the rear end on jackstands and have someone put it in gear and watch the inside tires to see if you have any hop or wobble.
    Also, what steer tires do you have and what condition are they in?
     
  4. goga

    goga Heavy Load Member

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    Nov 11, 2021
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    Tire pressure for capping, bearing, bad shock, wheel bent. Low speed, fast driving vibration? I have Centramatics all over truck and trailer. If tire started to cap, it is a done deal. Balancers and rotation can help to keep it longer though, it is cheaper than even one tire. If your inside rims are rusty, they loose balance.
     
  5. Wstardan

    Wstardan Bobtail Member

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    Feb 10, 2022
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    ****forgot to mention
    Wobble/shake feeling is most noticeable above 50mph. Very faint feeling going slower then that. The faster I go, the more noticeable it is.
     
  6. Sipou555

    Sipou555 Bobtail Member

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    Feb 14, 2022
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    What happened since then
    Did you get a chance to fix it?
     
  7. Wstardan

    Wstardan Bobtail Member

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    Feb 10, 2022
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    Got 8 drives balanced. Not much of a difference
     
  8. goga

    goga Heavy Load Member

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    Nov 11, 2021
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    The last resort from my own experience would be to put wheels from different, good riding truck, and see if that helps. If not, looking deeper into the axles would be the thing. When I bought recent truck it was bouncing steering like crazy after 60. I had steers balanced, new everything, looks straight on spin off, lastly put Centramatics on.. shaking, until new rubber came on. Same with drives.
     
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