Did you switch immediately over to synthetic after the ARX? I waited 2 more oil changes on dino to see if my rear main oil leak would stop, which it did not. (It was leaking before the ARX, too.) I tried this stop-leak at the recommendation of another tech and found it worked for me. http://stores.ebay.com/Best-Automotive-Solutions I felt it was easier than pulling the transmission out of my old truck to replace the rear main seal that was leaking. Not cheap stop-leak, though. Since then, switched over to synthetic oil and still not leaking. As far as which fluid is leaking, it sounds like you may have some coming from the rear main seal of your engine and possibly a tad from the front seal of the gearbox.