2019 389 driveline vibration

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by jake744, Aug 12, 2018.

  1. jake744

    jake744 Light Load Member

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    Ok wanted to update. They found my drive shafts are out of spec. They have a slight bend in the tube like an arch. Peterbilt is sending out all new driveshafts. Hope this cures my problems. My brand new truck I've never pulled a load with yet has been in shop for 4 weeks now.
     
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  3. Goodysnap

    Goodysnap Road Train Member

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    Bent tube huh? Seems like a stretch but possible I suppose. Seen shed or missing weights before or unbalanced, but never excessive run out. Highly suggest checking axle angles especially with air trac suspension.

    I would feel much more comfortable with locally built shafts built and balanced In house opossed to something packaged and shipped.....well you can imagine what a drive shaft has to go through to get from point A to point B truck freight.......just sayin. Not to mention downtime.

    Good luck.

    Keep us up to speed.
     
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  4. jake744

    jake744 Light Load Member

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    Thanks. I’ve always had all my driveline built local and there always top notch. But I’m at the mercy of warranty so I got to play there game.
    They claim one shaft had had excessive run out. The rep said replace them all for some reason.
    By the way my suspension is low air leaf.
     
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  5. pushbroom

    pushbroom Road Train Member

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    Dana has had some issues on the new shafts. These will be spl250lite. Slipshaft/ hanger bearing setup is new.
    I had one with 60 thou runout.
     
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  6. jake744

    jake744 Light Load Member

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    They said tube was bent but after speaking with my rep yesterday evening mine was the slip/hanger also.
     
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  7. Goodysnap

    Goodysnap Road Train Member

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    So someone has fallen asleep at the driveshaft assembly machine. So much for quality control. I did hear that some changes were being made to the slip yokes and support bearing from our rep.
     
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  8. jake744

    jake744 Light Load Member

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    I just wish I could get my truck back. Apparently Dana is behind and my shafts may not arrive for another week. My truck has 1,000 miles on it and haven’t pulled the first load. It has been at dealer now for almost 5 weeks.
     
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  9. pushbroom

    pushbroom Road Train Member

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    New shaft pic below.
    They switched to an outboard slip shaft. Center u joint is held in place by c clips instead of bolts/ straps. Front shaft is very light. Rear shaft is heavier then a normal shaft and a bit of a bear to install. Slip shaft flops around and is keyed to only go on in phase.
    The old u joint design seemed easier to service. Not sure how good c clips will be in 5+ years after they rust in.

    Your truck should still be fine to drive. Vibration starts at 80km and is usually gone by 100 or 110km.
    Wait times can be long on new shafts as they make them in a pair.
    Once they are on, it will be like floating on a cloud!!
    Dana___SPL_250_Lite_Driveshaft.59dbc6d91a4f9.jpg
     
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  10. Goodysnap

    Goodysnap Road Train Member

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    I too see potential issues with the oddball cap retention. I would have rather seen it full round with the bolts on cap retainers for at least some uniformity. This really auta throw a wrench in the plan when it comes to tow companies pulling driveshafts. They will still likely cut the clamps and yank it apart.

    I see non replaceable u- joints like automotive uses in our not to distant future.
     
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  11. daf105paccar

    daf105paccar Road Train Member

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    The rest off the world allready has those.
     
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