Thank you all for the info
Guys sorry for the delay.. but I went on leave and before that working hard.
I finally got my seal change,,, finally like you guys told me was the 12471590 Seal, Pinion/Differential Pinion Seal, part number 30 of the diagram attch, the seal itself was 18 dollars. I got one mechanic here to replace it for under 60 dollars. At the same time I decided to change my transmission liquid, with filter and pan gasket. And when I lifted up the car I realized that my rear differential was leaking little bit. So I decided to change the oil with the gasket.
I have done that and no more leak in the pinion, but my real differential still leaking a little,,, not enough to drip in the floor,,, but it looks like the differential cover is sweating!!! like if it was going trough the cover ... very weird. I had change the gasket and is not leaking from there if more near a bolt,,, I have put some seal tape on the bolt,,, it doesn't look like the bolt was wet. I will try to buy a new differential cover and see if still leaks,,,, but Im going to leave it like that for a while coz that oil is expensive and is not leaking to much.
I post some pictures for you guys.. thanks again.
My next things to do will be: Differential cover (rear), all sway bar stabilizer bushings, front sock absorber low bushing (if i can find them, if not new shock)... also lower front bushing....
aa I also had to change the rear parking break shoes coz they where broken.