Thanks for the replies, will go ahead and clean it up this week and see what I can find out. I am already ticked at the dealership as we spent a good 2600 with them two weeks ago to repalce brakes, calipers, much of the front end (originally was a ranch truck so was caked in mud, sand, and gunk for much of it life so far) and some how they did not see a huge oil leak....

They told me there was a lot of oil in the valley, and all drained down over the rear main seal so all oil leaks end up looking like (funny becuase not something they thought to check before doing the high pressure work and so forth, but are not saying so) the seal. My hope is that it is not. So far they (and another diesel mechanic) all keep saying seems to be in great shape runs good etc. then something happens or find something else.

Will see if can find another leak deep in the crevasses, have to find a good flashlight!