gotta 06 cummins ,just got the truck and noticed oil on the concrete ,coming from between the tranny and the engine ,wiped it off and hasent leaked since.inspected a little more and oil coming from behind the fan also,just wondering what the leaks might be coming from .the dealership changed the oil before it came home ,i checked it and it was a little full ,not much though ..any advice?

 

The leak between the tranny and the engine is likely to be the rear main. The one behind the fan is probably the crank seal... I could be wrong though. My advice is take it a mechanic and have it inspected.

 

Man front and rear seals at the same time I hope you have warranty! Anybody do something crazy like over rev it?