I have a 1999 ram 1500 4wd with a 5.2 auto. its been leaking a few drops for awhile, nothing major but it kills me to see an oil leak. It comes out of the inspection plate weep hole right between the trans and motor. I replace the valve cover gaskets, oil pan gasket, and the rear main seal. I place cardboard under the truck and started it and no leaks, let it run 20-30 minutes or so and no leaks. Shut the engine down and within 10 mins or so a spot the size of a quarter leaks onto the cardboard. Where/What could be causing this leak while the engine isn't running.

 

Not leaking out behind the intake, or valve covers, and just running down that way is it?

 

I pressure washed the engine so I could see if it was but it seems oil free up high....though it may have been the oil sending unit so I re-teflon taped it too. It's just crazy it only leaks with the engine off.

 

Oil pan gasket?

 

And it's engine oil? Not atf? Could be torque converter seal...

 

Add some dye to your oil, drive it for a couple days, then shine a UV light in there. Might be enlightening.