I'm not sure what is causing this leak, any help or advice would be appreciated, this is my front passenger side wheel, the fluid kinda smells like gear oil

 

Gear lube. axle seal is leaking. Passenger side isn't too much of an ordeal......

 

A couple of things to check before you run and buy tools and parts. Look for the vent tube on the front diff, disconect it and make sure its clear, do the same on the diff side. Next check your ball joints, if they are worn and the wheel is at an angel it will cause the seal to leak.

Tool and parts link
http://quad4x4.com/Dodge1500Dana44front1994-2001.html

 

Try putting the truck back down on all 4 wheels, instead of on it's side like that.

 

Haha thanks for all the help guys!