Hello. I'm new to the forum and this is my first post. My daughter and son-in-law have a 2006 3010, model KAF620E, Engine family KAXS.617N4CA. Oil leaking from flywheel cover. ?Crankshaft seal? Evidently It all leaked out. Re-filled the oil. Idles quiet, but at road speed it's making that dreaded, loud knockity-knock. ?Thrown a rod? Thinking about an overhaul. I downloaded the manual and skimmed through the engine/converter/exhaust removal instructions. Any tips, tricks or warnings?