It looks like my rear main seal is starting to fail. Not bad enough to drip on the driveway yet. I took it in for an oil change at the Jeep quick lube and they said the same. Now I'm going to have to set up an appointment at the dealership. I'm hoping there is a leaking sensor up high because I saw some residual oil on the middle of the bell housing. I check the oil all the time so this must be a new issue. I'm thinking 30,000 miles is low for it to start to fail.