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?
Cummina shaking
Discussion in 'Trucks [ Eighteen Wheelers ]' started by mirsadvic, Nov 24, 2014.
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Sounds like a ujoint maybe. They tend to bounce at certain speeds and drop away at slower speeds.
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At 12 rpm you are really lugging the motor.
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Its not where i run it its where i notice it
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Does it go away if you take it out of gear?
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Yeah or if i speed up or slow down
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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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