Rear pinion seal leaking?

[fx4superduty33]

I just noticed this morning, oil leaking from my rear pinion seal where it meets the rear axle housing, my truck is an 2008 with 54000 miles on her, is that normal on these trucks? I have a h&s black maxx and 5" flo-pro dpf delete exhaust that i put on 8000 miles ago, is it leaking now because im getting axlewrap with the extra horsepower? Im not that hard on her, any help would be great, thanks

[pyro2nite]

I noticed mine was leaking at 62,000 miles. 2,000 miles after the drive train warranty expired. After cleaning it appeared that is was a very slow leak.

[QtrFlsh]

I noticed mine leaking at about the same miles, took it in and had a pinion seal replaced, and fortunately the tech changed the diff fluid and saw that way too much metal was on the drain plug. He then opened the rear end and then discovered that the gears were set way way way too tight, and that the ring and pinion had been riding all the way together without any tollerance! Ended up getting the gears, bearings, limited slip clutches and seals all replaced...some others have had the same problem on here, especially with the earlier 08's. Mine was a dually by the way with 4:10's...So get that seal replaced, check the fill plug for metal and keep an eye on it! your warranty is done at 60k for the powertrain (engine 100k)...