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bad vibration problems

Discussion in 'Trucks [ Eighteen Wheelers ]' started by dieseldan2005, Aug 1, 2013.

Page 4 of 6
  1. Aug 6, 2013 #31
    shovel98

    shovel98 Light Load Member

    251
    241
    Jan 15, 2011
    mn
    0
    Its related to the ag380 its most likely suspension binding the 380 with its horseshoe bar twists and loads suspension up. make sure your leveling valve is set right and carry a spare have replaced my about once a year. very touchy on ride hgt off too much either way and will shake bad. MDalignment in Des Moines IA has written a paper about it and what causes the ag 380 to do that.
     
    shovel98, Aug 6, 2013
    shovel98, Aug 6, 2013
    #31
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  3. Aug 6, 2013 #32
    ENR

    ENR Light Load Member

    254
    50
    Oct 8, 2009
    Ontario
    0
    I thought of that also but it going away once it warms up eliminated that possibility. It would be an under power thing.
     
    ENR, Aug 6, 2013
    ENR, Aug 6, 2013
    #32
  4. Aug 6, 2013 #33
    dieseldan2005

    dieseldan2005 Light Load Member

    185
    17
    Feb 6, 2009
    North Branch, MN
    0
    Well the last couple days now it seems to do it a little more even after its warmed up. Its still not as bad, but its there. I am also feeling it in all gears now when I leave loaded in the morning. I have also been hearing more popping noises from up front when turning. Maybe my motor mounts are bad too. I just need to find time to get somethings looked at.
     
    dieseldan2005, Aug 6, 2013
    dieseldan2005, Aug 6, 2013
    #33
  5. Aug 6, 2013 #34
    Blind Driver

    Blind Driver Road Train Member

    3,080
    1,405
    Aug 7, 2006
    New Albany, IN
    0
    Every time I read that, I think to myself "I'll bet the dealer changed the oil before the truck was put up for sale".
     
    Blind Driver, Aug 6, 2013
    Blind Driver, Aug 6, 2013
    #34
  7. Aug 6, 2013 #35
    dieseldan2005

    dieseldan2005 Light Load Member

    185
    17
    Feb 6, 2009
    North Branch, MN
    0
    I bought the truck from a small company that was downsizing there were 4k miles on the oil after the bearings I had service records from the last 2 yrs on it.
     
    dieseldan2005, Aug 6, 2013
    dieseldan2005, Aug 6, 2013
    #35
  8. Aug 6, 2013 #36
    Blind Driver

    Blind Driver Road Train Member

    3,080
    1,405
    Aug 7, 2006
    New Albany, IN
    0
    Popping noises are probably from the spring shackles up front.

    Everything highlighted in bold indicates the problems is not driveline and is probably loacted in between the fender in front of the firewall. I think a good fuel injector cleaner might be a good cheap idea.

    Is the vibration noticeable when revving the engine off idle or only under load?
    Has anyone run a cutoff test?
     
    Blind Driver, Aug 6, 2013
    Blind Driver, Aug 6, 2013
    #36
    Heavyd Thanks this.
  9. Aug 6, 2013 #37
    dieseldan2005

    dieseldan2005 Light Load Member

    185
    17
    Feb 6, 2009
    North Branch, MN
    0
    No its not and no one has done a cutout test.
     
    dieseldan2005, Aug 6, 2013
    dieseldan2005, Aug 6, 2013
    #37
  10. Aug 10, 2013 #38
    dieseldan2005

    dieseldan2005 Light Load Member

    185
    17
    Feb 6, 2009
    North Branch, MN
    0
    Well i think i might have found my vibration. I was under the truck greasing it last night and i grabbed the rear drive shaft between the drivers and it had in and out movement from the output shaft on the front diff. Not sure if there is a normal amount of play, but it moved maybe a 1/16. Not sure if thats normal or not. If not i would assume there is a bad bearing on the output shaft? If so do you have to pull the power divider out to fix it?
     
    dieseldan2005, Aug 10, 2013
    dieseldan2005, Aug 10, 2013
    #38
  11. Aug 10, 2013 #39
    Superhauler

    Superhauler TEACHER OF MEN

    12,209
    100,723
    Jan 30, 2010
    keep stroking.
    0
    in and out movement is normal if it has a lot of miles on it.
     
    Superhauler, Aug 10, 2013
    Superhauler, Aug 10, 2013
    #39
  12. Aug 10, 2013 #40
    dieseldan2005

    dieseldan2005 Light Load Member

    185
    17
    Feb 6, 2009
    North Branch, MN
    0
    ok, well i can hopefully rule that one out then. The rear slip yoke also had some up and down movement to it also.
     
    dieseldan2005, Aug 10, 2013
    dieseldan2005, Aug 10, 2013
    #40
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