You probably have a worn seal(s) or bad gasket(s).
check your transmission check your hoses for leaks and check your fluids but check your transmission first
its a rear main oil seal that has to be replaced. mine leaks too
If it wasn't ignorance (putting oil in wrong hole), then it's probably the rear oil seal.
Determine where leaks originates. Cooling line? Seal?
could be burning either gear oil, or motor oil. check for leaks and replace gear oil
if no leaks or problems, they recommend every 60< thousand miles.
Assuming we are talking about the rear oil seal on that transmission, if it has been replaced and it still leaks, check the condition of the universal joints in the driveshaft.
The oil fill is on the drivers side of the engine. There is no transmission dip stick, because it is a sealed transmission. There is a fill plug on the side of the transmission that if removed and transmission fluid leaks out, the level is fine.
The 2500 Cummins Turbo might have a sticky transmission because the oil viscosity is wrong.
Pour the transmission fluid down the hole the transmission dip stick goes in. You will need a funnel to do it right. WRONG! Do not pour transmission oil into your engine oil compartment! There is no dipstick for transmission oil, at least not on the manual transmission. To fill the transmission, you must pump or pour fluid into the fill hole on the side of the transmission until it dribbles back out.
Check for coolant in the oil or oil in the coolant. Dodge Neons are notorious for head gasket leaks and warped heads due to overheating.
No, it will not cause oil leaks.