was out in the shop pittlin with the race car an noticed what looked like ATF on the inside lip of front wheel of my 95 xplorer 4x4,...no puddle or streeks down the tire side wall,..spect its a hub sill going bad,...if so how hard is it to replace??

 

As a quick fix I have just added oil, before a ride. Then next time it sits no oil.
I think it justs gets a little dirt under a seal, causes a leak.

It's a actually a pretty easy fix to replace the seal. The seal on the strut is a little more involved, but the hub seal in more common to see leak from. I find anyway

 

maybe age of seal or like mentioned dirt or some thing got in there. shouldn't be too hard to replace.

 

Take it apart yourselfm if everything is working fine its a pretty cheap fix. Check the sleeve that the seal rides on, on the strut. If its grooved or worn, you can replace this also when you change the seal. They are just CR seals and a good bearing supplier can get them real cheap.