I got under truck with thesescope and could really hear the knocking toward the middle of the oil pan? My guess the rod bolts have loosened up. I only have 10000 miles on the engine since Dodge did the long block replacement. I called a service manager at Dodge dealership today, I request that they drop the oil pan and see if something has come loose. I am wondering if they will honor anthing if it was something done wrong at assembly. The new engine was done on the truck in 2006. I figure best to let them drop the oilpan to inspect instead of me? The last thing I want them thinking is that I did something.