I'm still scratching my head as to your situation. I have a friend with a Valley hitch and I am trying to remember if it uses jaws or a slide bar. You say that it was hitched properly and you ended up dropping it on your truck bed. If it was hitched properly then it should not have dropped. If you were high hitched, then yes, this can happen. An inspection revealed that nothing was wrong with the hitch? This is perplexing. What is your theory?
2002 Chevy 2500HD CC/LB D/A