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Random clutch slipping i shift

Discussion in 'Volvo Forum' started by fox128, Mar 9, 2023.

  1. Mar 9, 2023 #1
    fox128

    fox128 Bobtail Member

    3
    0
    Mar 8, 2023
    iowa
    0
    My truck will out of nowhere acts like it partially disengages the clutch causing it to slip and then it derates the truck for a while. It happens 2-10 times a day regardless of load. I cannot establish any pattern or certain thing that causes it to happen. I've had it to the dealer and they don't know what to do. they ran clutch calibrations and it all checked out fine. Clutch is at 50% life. Any ideas where to start?
     
    fox128, Mar 9, 2023
    fox128, Mar 9, 2023
    #1
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  3. Mar 10, 2023 #2
    nasriza

    nasriza Road Train Member

    2,368
    2,040
    Feb 1, 2013
    Chicago, IL
    0
    First start if you top timing cover is leaking oil possible oil contamination, second need to check pwm test on clutch to verify that clutch system is not loosing air maybe solenoid valve causing the problem, than trace down fault codes and last possibly drop trans to check if broken springs on clutch maybe something is getting between clutch disc and flywheel causing problems( no computer will ever tell you this)
     
    nasriza, Mar 10, 2023
    nasriza, Mar 10, 2023
    #2
  4. Mar 10, 2023 #3
    bad-luck

    bad-luck Road Train Member

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    Nov 16, 2013
    Baltimore, Maryland
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    @Goodysnap
     
    bad-luck, Mar 10, 2023
    bad-luck, Mar 10, 2023
    #3
  5. Mar 10, 2023 #4
    Goodysnap

    Goodysnap Road Train Member

    3,502
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    Jul 12, 2017
    0
    I just work on junk Peterbilt’s with Eaton. Lol.

    Never seen a I-shift
     
    Goodysnap, Mar 10, 2023
    Goodysnap, Mar 10, 2023
    #4
    Concorde Thanks this.
  7. Mar 10, 2023 #5
    bad-luck

    bad-luck Road Train Member

    3,023
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    Nov 16, 2013
    Baltimore, Maryland
    0
     
    bad-luck, Mar 10, 2023
    bad-luck, Mar 10, 2023
    #5
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