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Strange Vibration when loaded

Discussion in 'Trucks [ Eighteen Wheelers ]' started by thesvg, Jul 14, 2011.

Page 1 of 3
  1. Jul 14, 2011 #1
    thesvg

    thesvg Light Load Member

    192
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    Dec 9, 2010
    0
    hello fellow truckers. I've been noticing a strange vibration it shakes up my whole cab when I'm loaded going from 25-40 mph on 6th both High and Low sides. I thought It was the carrier bearing but when empty it does not shake like this. I've also taken the truck out of gear while its around those speeds I mentioned and it still shakes. Anybody every had this problem before?

    Thank you
     
    thesvg, Jul 14, 2011
    thesvg, Jul 14, 2011
    #1
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  3. Jul 14, 2011 #2
    Yup

    Yup Medium Load Member

    569
    129
    Apr 2, 2011
    Everywhere,USA(Texas)
    0
    All of your drive tires even on tread ?
    Even 1/2" on one will cause a good low speed shake
    that feels like its something to do with the front end.
    It only takes one mismatch to throw off your geometry
     
    Yup, Jul 14, 2011
    Yup, Jul 14, 2011
    #2
  4. Jul 14, 2011 #3
    thesvg

    thesvg Light Load Member

    192
    13
    Dec 9, 2010
    0
    well, i had a flat tire, but i plugged it up, all of the tires are pretty much even.
     
    thesvg, Jul 14, 2011
    thesvg, Jul 14, 2011
    #3
  5. Jul 15, 2011 #4
    Kittyfoot

    Kittyfoot Crusty Ancient

    2,092
    3,056
    Sep 21, 2009
    Sorrento, Louisiana
    0
    Did you re-balance after plugging? I never thought much of plugging a radial. Pull it and patch inside, then move that tire to the rear. Not a fan of running a "repaired" tire on steering.
     
    Kittyfoot, Jul 15, 2011
    Kittyfoot, Jul 15, 2011
    #4
  7. Jul 15, 2011 #5
    thesvg

    thesvg Light Load Member

    192
    13
    Dec 9, 2010
    0
    No the problem is it jerks when its loaded from the rears my steer axle is fine
     
    thesvg, Jul 15, 2011
    thesvg, Jul 15, 2011
    #5
  8. Jul 15, 2011 #6
    lovesthedrive

    lovesthedrive R.I.P.

    15,953
    54,484
    Nov 11, 2008
    Sorrento Maine
    0
    Sounds as if your axles are getting misaligned from the weight. Check all your rubber bushings, check the springs and mounts. Something is loose, as you add weight it is going out of alignment.
     
    lovesthedrive, Jul 15, 2011
    lovesthedrive, Jul 15, 2011
    #6
    thesvg Thanks this.
  9. Jul 15, 2011 #7
    Onetruckpony

    Onetruckpony Medium Load Member

    544
    372
    Jun 11, 2011
    0
    Check air ride height and drive shaft alignment.
     
    Onetruckpony, Jul 15, 2011
    Onetruckpony, Jul 15, 2011
    #7
    BigJohn54 Thanks this.
  10. Jul 15, 2011 #8
    CondoCruiser

    CondoCruiser The Legend

    19,726
    18,734
    Apr 18, 2010
    Tennessee
    0
    Yes, air ride height off just an 1/8" will put your driveline in a bind and cause a vibration. Depending on the truck, the rod can slip or get bent if it's a fixed rod.
     
    CondoCruiser, Jul 15, 2011
    CondoCruiser, Jul 15, 2011
    #8
    BigJohn54 Thanks this.
  11. Jul 16, 2011 #9
    dunctrk379

    dunctrk379 Light Load Member

    213
    11
    Jul 12, 2011
    lowndesboro,al
    0
    well mine does the same. how do you know what ride height is supposed to be
     
    dunctrk379, Jul 16, 2011
    dunctrk379, Jul 16, 2011
    #9
  12. Jul 16, 2011 #10
    Onetruckpony

    Onetruckpony Medium Load Member

    544
    372
    Jun 11, 2011
    0
    Do a forum search, there is a thread on here somewhere telling you how to measure it. I cant post links with my phone or I would put it here for you.
    If you have a suspension dump try dumping and recharging it to see if that helps.
    Good Luck.
     
    Onetruckpony, Jul 16, 2011
    Onetruckpony, Jul 16, 2011
    #10
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