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o9 KW vibration, shakes under acceleration

Discussion in 'Kenworth Forum' started by gah171, Feb 13, 2013.

Page 2 of 2
  1. Feb 16, 2013 #11
    dirtydeeds

    dirtydeeds Bobtail Member

    8
    1
    Feb 11, 2013
    0
    Oh yeah ;) Check the injectors also
     
    dirtydeeds, Feb 16, 2013
    dirtydeeds, Feb 16, 2013
    #11
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  3. Feb 16, 2013 #12
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

    8,701
    24,836
    Jan 20, 2010
    Hesperia, Ca.
    0
    Had a similar problem. After I replace all the u-joints, still had the problem. Then I had someone tell me to check the driveshaft. The spline in the the shaft wears eventually if not lube. Many always lube the u-joint but forget the driveshaft itself. Anyways, I replace the driveshaft, problem solved.
     
    Diesel Dave, Feb 16, 2013
    Diesel Dave, Feb 16, 2013
    #12
  4. Mar 11, 2013 #13
    gah171

    gah171 Bobtail Member

    16
    2
    Oct 1, 2012
    Pa
    0
    Problem solved. I had a manual forced regen done a few days ago thinking my dpf is clogged, truck hardly ever regens. that didn't solve anything. had a mechanic hook a lap top up to my engine and it was monitored while I drove, looking for a possibly bad injector, that showed no problems. engine is fine. Problem that made my truck shudder at speed was at rear of trans (8LL) had a lot of movement, at this point (today) it was leaking oil, I could move driveshaft up and dowm probably 1/4 inch. At shop my truck is at mechanic is going to try tightening big nut up first, he says it doesn't appear to be as tight as it should be, if slop isn't eliminated bearing will need replaced in extreme rear of trans. should be done tomorrow sometime. I'm so happy I found what was wrong.
     
    gah171, Mar 11, 2013
    gah171, Mar 11, 2013
    #13
    VisionLogistics Thanks this.
  5. Mar 11, 2013 #14
    VisionLogistics

    VisionLogistics Road Train Member

    1,551
    978
    Dec 8, 2011
    Jellystone
    0
    Thanks for the follow up. Glad it worked out.
     
    VisionLogistics, Mar 11, 2013
    VisionLogistics, Mar 11, 2013
    #14
  7. Mar 14, 2013 #15
    pawpaw1

    pawpaw1 Medium Load Member

    396
    145
    Sep 9, 2011
    Dallas,Ga.
    0
    Almost bet its carrier bearing , maybe u-joint , if its really badly worn out. You can check both of these items out yourself , if you don't mind getting a little dirty.
    Hearing any noise , when you're starting out ?
     
    pawpaw1, Mar 14, 2013
    pawpaw1, Mar 14, 2013
    #15
  8. Mar 15, 2013 #16
    gah171

    gah171 Bobtail Member

    16
    2
    Oct 1, 2012
    Pa
    0
    There was no noticeable noise when starting out, truck would start to shudder or vibrate when accelerating. problem was large nut on end of trans that holds yoke on, it was getting loose, speedometer started acting up the day I figured problem out. parts of speedometer gear was damaged, that got replaced, new oil seal and nut tightened up. Truck runs so smooth now.
     
    gah171, Mar 15, 2013
    gah171, Mar 15, 2013
    #16
  9. Mar 15, 2013 #17
    pawpaw1

    pawpaw1 Medium Load Member

    396
    145
    Sep 9, 2011
    Dallas,Ga.
    0
    from all of us , you're welcome.
     
    pawpaw1, Mar 15, 2013
    pawpaw1, Mar 15, 2013
    #17
  10. Mar 17, 2013 #18
    gah171

    gah171 Bobtail Member

    16
    2
    Oct 1, 2012
    Pa
    0
    Just wanted to thank everyone for your suggestions. Thanks.
     
    gah171, Mar 17, 2013
    gah171, Mar 17, 2013
    #18
  11. Mar 1, 2014 #19
    Lumpylar

    Lumpylar Bobtail Member

    5
    3
    Mar 1, 2014
    Mahtomedi Mn.
    0
    I also had a bad vibration and shaking mostly in the higher gear range and that turned out to be a broken motor mount. Just something to keep in mind. I was told Cat motors are notorious for that.
     
    Lumpylar, Mar 1, 2014
    Lumpylar, Mar 1, 2014
    #19
    Shiro Thanks this.
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