It's not in a truck, but I got a call from a well driller today to look at a C-16 Cat industrial that lost oil pressure. The pan was off when I got there and full of... get this... Gear teeth and a chewed up 3/8"x1.25" bolt. They were worried about where the bolt came from :bangh. I said "from inside the engine". I think they have a problem child already, It came from the North Dakota oil fields, got a whole ten hours on it yesterday and today. In addition to this problem, it's leaking oil around the spacer plate... Not good.