2015 Prostar has stability and handling issues when hooked to a trailer

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Packer1077, May 12, 2020.

  1. Packer1077

    Packer1077 Bobtail Member

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    Yes it looks exactly like that. There is a black plastic box/container, behind that or to the side of it?
     
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  3. Heavyd

    Heavyd Road Train Member

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    Not sure what you are talking about there. Can you take and upload a picture of what you are trying to identify?
     
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  4. Packer1077

    Packer1077 Bobtail Member

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    For some reason I can’t upload a photo. I went to far into removal. I see what you’re talking about. My diagram has no F-8’s on it. Goes from 7’s to 9’s.
     
    Last edited: Aug 2, 2020
    Reason for edit: Incorrect information
  5. Packer1077

    Packer1077 Bobtail Member

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    just lost all stability of truck again. Part of road was new pavement and raised approximately 5-6 inches. I went up it at approximately 40 mph and lost all of it again. This time it even took AC with it. (Going left lane to right lane)
     
  6. Packer1077

    Packer1077 Bobtail Member

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    Last edited: Aug 2, 2020
    Reason for edit: Photo added
  7. Heavyd

    Heavyd Road Train Member

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    All the attachments have errors. Can't see anything.
     
  8. Packer1077

    Packer1077 Bobtail Member

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  9. Packer1077

    Packer1077 Bobtail Member

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    International dealership in San Antonio said there are no codes on dash so there is no reason to go further. Umm ok?! Here’s the crazy thing...drove the truck now after tow and it seems ok (?). How can a tow make sensors go back? The service guy said that sensors were only doing a test and that’s why it’s okay to drive. Ugh. I’m outta here.
     
  10. Heavyd

    Heavyd Road Train Member

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    Do you mean you had a front end alignment and they set the toe? This can help because when the toe is off, so is the actual steer-ahead which can cause darting and other handling problems along with the steering angle sensor not being aligned to the true straight ahead.
     
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