[Richard]

Terry,

Sorry about the repair work needed. I just want to make sure I understand exactly which pin came loose and how it was still with the system. I have a Blue Ox setup. I am having a hard time putting those two statements together and seeing what happened.

Are you talking about the pin that holds the tow bar into the two inch square receiver ?
Are you talking about one of the two pins that attach the tow bar to the vehicle?
Are you talking about the center pin that bolts two pieces of the two bar together?

I apologize that I am a little slower than most.