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Grinding sound

Discussion in 'Volvo Forum' started by believe456, Jul 18, 2018.

  1. Jul 18, 2018 #1
    believe456

    believe456 Light Load Member

    191
    22
    Apr 22, 2015
    0
    I have an 06 vnl670 Cummings motor Eaton fuller autoshift. When I’m really heavy the truck Makes a grinding sound I’m first gear or reverse when i first hit accelerator. Last about a half second. If i ease on accelerator it doesn’t do it. I changed out one of the drive shafts thinking it was that. No change. Any ideas???
     
    believe456, Jul 18, 2018
    believe456, Jul 18, 2018
    #1
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  3. Jul 18, 2018 #2
    Bakerman

    Bakerman Road Train Member

    4,663
    8,812
    Jan 27, 2013
    Phoenix, AZ
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    Check u-joints and carrier bearings also.
     
    Bakerman, Jul 18, 2018
    Bakerman, Jul 18, 2018
    #2
    Dave_in_AZ and magoo68 Thank this.
  4. Jul 18, 2018 #3
    Mudman78

    Mudman78 Light Load Member

    106
    108
    May 23, 2016
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    Throwout bearing on clutch or pilot bearing on flywheel.
     
    Mudman78, Jul 18, 2018
    Mudman78, Jul 18, 2018
    #3
    Dave_in_AZ Thanks this.
  5. Jul 19, 2018 #4
    Johny41

    Johny41 Road Train Member

    1,192
    1,020
    Feb 10, 2011
    Ontario, Canada
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    Do you lose air presure, is the compressor running nonstop while parked idling under heavy load? Could be the air springs leaking on drive axle, won't lift/ hold heavy load at leveling height in idling mode low rpm, changes the driveline angle. It happens to hear grinding noise when leveling valve/rod goes bad. Just an idea!
     
    Johny41, Jul 19, 2018
    Johny41, Jul 19, 2018
    #4
  7. Jul 20, 2018 #5
    KB3MMX

    KB3MMX Road Train Member

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    Dec 29, 2014
    Orrstown, PA
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    Might be that Cummings motor giving all the trouble, try replacing with a CUMMINS.

    Lol, I'm kidding.

    How many miles on the trans?
    Might be super sloppy..
     
    KB3MMX, Jul 20, 2018
    KB3MMX, Jul 20, 2018
    #5
    mslashbar Thanks this.
  8. Jul 23, 2018 #6
    believe456

    believe456 Light Load Member

    191
    22
    Apr 22, 2015
    0
    1.6
     
    believe456, Jul 23, 2018
    believe456, Jul 23, 2018
    #6
  9. Jul 23, 2018 #7
    Arkansas

    Arkansas Medium Load Member

    514
    669
    Dec 20, 2014
    LA- Lower Arkansas
    0
    Check the leveling valve on your airbags
     
    Arkansas, Jul 23, 2018
    Arkansas, Jul 23, 2018
    #7
  10. Jul 24, 2018 #8
    KB3MMX

    KB3MMX Road Train Member

    3,075
    2,596
    Dec 29, 2014
    Orrstown, PA
    0
    Most likely worn out bearing slop. At 1.6M it Doesn't owe anybody anything ....time for a freshening..
     
    KB3MMX, Jul 24, 2018
    KB3MMX, Jul 24, 2018
    #8
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