I just recently started noticing quarter to silver dollar sized spots in my driveway scattered about depending on where I park my truck, upon taking a look under I notice that the rear part of the oil pan/bellhousing/good portion of the tranny up until about the y pipe crossover is decently "glazed" with oil. Naturally the oil finds the lowest point which is the very bottom of the bellhousing where it mates to the oil pan...My initial thought (as I always think of the worst possible scenario, usually ends up being that for me!) is rear main seal, however I used a brand new seal when I rebuilt the motor last year (10k miles on it since) so it seems kind of odd to me for that to be going already? My other thoughts are maybe a few loose bolts on the oil pan that need snugging, oil pressure sender (couldn't really see any leakage down the top of the bellhousing), or a leaking oil dipstick tube? I need to get this thing on a lift to further inspect, I guess my question is how likely are the 4 scenario's I've mentioned here?