Coach-man wrote:
Two comments stand out, first you suspect the trailer has been raised so the previous owner could traverse back roads, and you notice play between the pin box and the sheet metal. As old biscuit mentioned measure the travel since I suspect there is frame damage at that is why it was sold. Any question or problem in doing it, get a professional involved before there is a real problem. Good Luck!
What CM and OB said.
Major investigation required.
No disrespect, suspect this is not you - so.....
have it inspected by someone who knows RV frames and suspension.
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