Need Some Help

[jessemonroe]

Ok. was trying to replace the o-ring on the fuel sending unit today and broke the bolts on both of the fuel tank straps. Got them fixed and never even got to drop the tank. I figured I would do another day. Well while under the truck I noticed what appeared to be an oil leak at the front right side. I went to take a look and the Starter/CV Joint area is covered with clear oil. About a week ago while driving home I herd what sounded like a big rock that hit the under carriage on the right side. I pulled over and did not see anything and I know it wasn't a rock because I was driving on a paved road...anyway. Here is the pic from the area. Can someone give me a clue as to where the oil could be comming from. I don't think its motor oil. Also I really need some advice on taking out the gas tank on a crew cab 02. I can't get to the filler neck or vent tube to disconnect them like the hanes manual says. Any help is appreciated it.
Thanks

[F9K9]

Can't see the pic, sorry.

[hootz]

Possible right axle seal (where inner cv joint fits into front differential housing).

[jessemonroe]

Any info on how to change the axle seal out? It would be appreciated.