Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
With any oil leak I recommend checking the PCV system. When there is a high crankcase pressure, the oil will be pushed out. Most times it seems to get out the rear main seal. That may not be the case with yours though.
The best way to be sure is to clean off all of the existing oil, (make sure it's full) then run the engine while you look to see if it is coming from the top, (below the valve covers) or if it is in between the engine and trans., that would be the rear main seal. But you will want to check the PCV system first, to make sure that the oil is not being forced out, thanks
There has been a service bulletin for the oil pan leak, involves sealing the gasket surface.
There has also been a service bulletin for the breather hose over flowing under certain conditions.
Owners of 1998 - 2002 (BR) Ram Trucks equipped with the 24-valve Cummins diesel engine may experience engine oil overflow from the front crankcase breather when the vehicle is operated off-road on an extreme downhill grade (37.5% or 22°slope/grade). Operation of this type for extended periods of time can cause enough engine oil depletion to damage the engine. A kit containing all components necessary to eliminate the oil overflow has been made available.
Only if that is what is happening with it. However, if the engine is being over filled by the injector pump, the oil will leak out faster and have an effect on the crankcsase breathing system.
You will want to get the over filling of the engine oil fixed and then see if there even is an oil leak.
Well, if the oil level is at the max and then goes up after running the engine, that means that the oil is getting filled with fuel, (which is a form of oil) and that can be a stuck opened injector, (which would normally give you a miss) or a bad pump. You would have to do some extensive testing on it.