So....when I got home after work yesterday, I find this laying in the driveway.
At first, I thought it was a bolt from my wife's car since we had driven it on Saturday. I thought I could have missed it. But I crawled under the truck first to see where it could have come from.
This is what I found.
So....I was a bit surprised by that. I put the bolt back in, tightened up the one that started to back out and checked the other two. One of the other ones had just started to loosen. I am glad that bolt fell out on the driveway instead of while I was driving. If I hadn't seen it, I don't think I would have got under to check the other bolts. Eventually, the shaft would have let go and I don't want to think about what would have happened.