Had a knocking noise from the under & aft part of my engine. The local dealership suspected a rod bearing was going. After dropping the oil pan turns out I have crack in my crankshaft. My truck has 72K miles and I'm out of warrant. Anyone else had this issue? Now I get to deal with FMC and see if they will pick up the some of the tab. Before dropping the oil pan, the dealership quoted me a new engine for 10K!