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please help. loud grinding noise going down the road

Discussion in 'Trucks [ Eighteen Wheelers ]' started by welttruck, Nov 7, 2012.

Page 1 of 5
  1. Nov 7, 2012 #1
    welttruck

    welttruck Bobtail Member

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    Jun 15, 2012
    0
    I cant get an answer on what is making the horrible grinding noise. It only does it over 60mph, then it comes and goes constantly will only stop for a few seconds, and goes away when clutch is pressed. Had drives shafts checked and inspection plate removed, they said didnt see anything wrong with throwout bearing, and they greased it....that made no difference. any ideas?? please help
     
    welttruck, Nov 7, 2012
    welttruck, Nov 7, 2012
    #1
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  3. Nov 7, 2012 #2
    power freak

    power freak Light Load Member

    220
    60
    Apr 23, 2009
    0
    Possibly a bearing going in the trans most likely the one on the main shaft between the main box and auxiliary section
     
    power freak, Nov 7, 2012
    power freak, Nov 7, 2012
    #2
    Another Canadian driver Thanks this.
  4. Nov 7, 2012 #3
    WMGUY

    WMGUY Road Train Member

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    Jan 1, 2011
    Nine Mile Falls, WA
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    sounds like the throw out bearing buy could be wrong
     
    WMGUY, Nov 7, 2012
    WMGUY, Nov 7, 2012
    #3
    Another Canadian driver Thanks this.
  5. Nov 7, 2012 #4
    welttruck

    welttruck Bobtail Member

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    Jun 15, 2012
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    forgot to mention, they drained the fluid and didnt find any thing other than normal wear filings
     
    welttruck, Nov 7, 2012
    welttruck, Nov 7, 2012
    #4
    Another Canadian driver Thanks this.
  7. Nov 7, 2012 #5
    welttruck

    welttruck Bobtail Member

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    Jun 15, 2012
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    Can it be the clutch ??
     
    welttruck, Nov 7, 2012
    welttruck, Nov 7, 2012
    #5
    Another Canadian driver Thanks this.
  8. Nov 7, 2012 #6
    Johny41

    Johny41 Road Train Member

    1,192
    1,017
    Feb 10, 2011
    Ontario, Canada
    0
    I have all the time a spare air ride leveling valve and rod in my truck, Volvo has weak design for this; i lost it many times on bumpy roads and once the driveline shafts are not straight makes a horible griding noise, : Maybe is not totally gone, just malfunction, check air ride pressure
    and inspect the air ride valve located in most trucks under 5th wheel.
     
    Johny41, Nov 7, 2012
    Johny41, Nov 7, 2012
    #6
    Another Canadian driver and LindaPV Thank this.
  9. Nov 7, 2012 #7
    cowboy tmc

    cowboy tmc Light Load Member

    86
    21
    Sep 19, 2010
    south boston va
    0
    check and see air bigs are up
     
    cowboy tmc, Nov 7, 2012
    cowboy tmc, Nov 7, 2012
    #7
    Another Canadian driver and 6wheeler Thank this.
  10. Nov 7, 2012 #8
    welttruck

    welttruck Bobtail Member

    5
    3
    Jun 15, 2012
    0
    peterbilt said the ride height was a 1/2inch too low but that gave me a shake and still had the grinding noise. I am about to pull my hair out. like i said only over 60mph, then it does it for 5-6 sec. then quits for 5-6 sec and then sometimes it stops for alittle while. I really notice it more when coasting down a hill, it seems like whatever it is may be dragging the truck down but IDK.
     
    welttruck, Nov 7, 2012
    welttruck, Nov 7, 2012
    #8
    Another Canadian driver Thanks this.
  11. Nov 7, 2012 #9
    Mark Kling

    Mark Kling Technology Contributor

    10,935
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    Sep 23, 2007
    Statesville, NC
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    I agree with the air bag leveling valve. I had a grinding noise all the way from TX to OH. it got so bad that i had to drop the bags to go over any type of bump backing up or going forward. Volvo replaced the leveling valve and the noise went away. Luckily it was still under warranty, but if I kept driving with it, it would have torn the transmission up. This valve should be back around the drive tires on the inside frame.
     
    Mark Kling, Nov 7, 2012
    Mark Kling, Nov 7, 2012
    #9
    LindaPV Thanks this.
  12. Nov 8, 2012 #10
    heavyhaulerss

    heavyhaulerss Road Train Member

    3,723
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    Dec 23, 2009
    AL/TN BORDER
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    try taking it out of gear at 60 & see if the noise is there while coasting.
     
    heavyhaulerss, Nov 8, 2012
    heavyhaulerss, Nov 8, 2012
    #10
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