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I have a 2006 volvo 670 with cummins isx 400hp. when im driving and get up to 40 mph i start to hear a knocking sound and the truck vibrates as well. took it to volvo and they couldn't find what was wrong. checked injectors cut out test replace rocker lever shaft, solenoid and checked diff oil for metal and transmission oil for metal. checked drive line and harmonic balancer on engine still have knocking noise checked cam and tested injectors.

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6ya6ya
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Posted on Jan 02, 2017

  • 15 Answers

SOURCE: Oil leak from crank shaft by harmonic balancer on

remove balancer and replace crank seal

Posted on Mar 09, 2009

  • 10865 Answers

SOURCE: 2006 expedition knocks at 40-45 MPH

Toss a couple cans of engine medic into your gas tank and I bet you will solve alot of your problem

Posted on Aug 23, 2009

  • 1340 Answers

SOURCE: My 1995 Buick Riveria Supercharge- the other day

I don't think so.They seem to be on top of the situation more than the dealer for 1 thing.For vibration,I don't really think a compression test would show anything.That would be more of a loss of power issue.If that shop did not think the other 2 mounts were bad enough to require replacement,the answer is probably somewhere else.If this is an automatic,when do you put it in neutral?At lights or long stops?I would like to know the answer for that please.It could just be the age of the car and normal wear and tear is causing it but if the vibration is bad enough to post here,there could be something.I have a 1995 Escort wagon with 135k miles and it shakes a little bit.Anyhow,just comment here and I will get an aoto link back here to see what you said.
Thanks,Greg

Posted on Aug 28, 2010

  • 1 Answer

SOURCE: i have 05 volvo vnl 670, isx cummins 450/500.

I have a 2007 Volvo 670. The check vehicle ecu comes on. The fault code is MID 144 PID 191 FMI 5. THe truck won't go pass 1400 rpm, the speedometer doesn't work, the cruise doesn't work, the engine break doesn't work. I have to turn the truck off going down the road at highway speed for about 10 seconds and it'll go back to normal. Can anybody help?

Posted on May 21, 2011

  • 13 Answers

SOURCE: Vibration in the drive train at 40 mph in my 1993 Ford 150

I would check the driveshaft universal joints and the play in the yolk joints where the driveshaft exits the transmission and where it enters the differential.
It could be the preliminary vibration caused by the deterioration in a universal joint, forewarning you that it's on the way out. Good Luck Vern

Posted on Feb 01, 2012

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