2019 389 driveline vibration

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

  1. Goodysnap

    Goodysnap Road Train Member

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    They have a very effortless pedal feel and is air assisted. Down side is it is very easy to abuse the brake and you can destroy it in short order if your not paying attention. Plus there is no clue when to adjust other that the brake is gone and the pedal hits the firewall.
     
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  3. Rubber duck kw

    Rubber duck kw Road Train Member

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    What do you mean by non replaceable ujoints, like a giant c.v shaft for a driveshaft?
     
  4. Goodysnap

    Goodysnap Road Train Member

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    Automotive applications have non-greasable u joints that are permanently staked into the yokes. When a joint fails, you replace the entire shaft.
     
  5. Rubber duck kw

    Rubber duck kw Road Train Member

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    Well thats kinda ignorant, unless the shaft costs the same as a ujoint, which I highly doubt.
     
  6. Cam Roberts

    Cam Roberts Road Train Member

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    Driveline angles will cause vibration but has nothing to do with trans popping out of gear under load. Too much torque applied to trans for vibe to knock it out of gear. You sir have a bad trans.
     
  7. Tom P

    Tom P Bobtail Member

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  8. Tom P

    Tom P Bobtail Member

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    also have a 2019 389 with vibration problems.Dealer pulled front shaft had it rebalanced.Truck was great for a week then started vibrating again.Its back at the dealer again.
     
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  9. jake744

    jake744 Light Load Member

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    Mine was the front hanger shaft. The spline end was not welded on true. They replaced both shafts cause they are built as as pair. My truck is smooth now. My shafts are SPL250 light series.
     
  10. KB3MMX

    KB3MMX Road Train Member

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    Peterbilt quality seems to have really suffered, this looks to be a widespread problem with the SPL250 Driveline
     
  11. Goodysnap

    Goodysnap Road Train Member

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    Technically this would be a Dana/Spicer issue. Their product happens to be installed on alot more than just Pete's.
     
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