Cummina shaking

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mirsadvic, Nov 24, 2014.

  1. mirsadvic

    mirsadvic Light Load Member

    70
    5
    Dec 23, 2013
    0
    Hey guys i got an 09 volvo 780 18 spd. Cummins motor.. Im biob tailing rite now and at about only 60mph 12 rpm it seems to be vibrating any idea what may be the issue?
     
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  3. PurplePete

    PurplePete Light Load Member

    131
    24
    Nov 15, 2011
    Tyler, Mn
    0
    Sounds like a ujoint maybe. They tend to bounce at certain speeds and drop away at slower speeds.
     
  4. postmandav

    postmandav Medium Load Member

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    90
    May 18, 2008
    south portland, maine
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    At 12 rpm you are really lugging the motor. :biggrin_25522:
     
  5. mirsadvic

    mirsadvic Light Load Member

    70
    5
    Dec 23, 2013
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    Its not where i run it its where i notice it
     
  6. 062

    062 Road Train Member

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    Oct 20, 2013
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    Does it go away if you take it out of gear?
     
  7. mirsadvic

    mirsadvic Light Load Member

    70
    5
    Dec 23, 2013
    0
    Yeah or if i speed up or slow down
     
  8. 062

    062 Road Train Member

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    Oct 20, 2013
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    Most likely in the driveline,if it goes away out of gear. Just have to check everything.
     
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