I'm leaking a little Diff Fluid from my pinion and was curious if i can replace the pinion seal without removing the diff? I looked at a schematic and it looks like you could but i'm not sure? It hardly leaks any and i've been putting off putting the time in to fix it, but it's time..

 

Yes you can replace both teh pinion and half-shaft seals with the diff in the car. Check-out the FSM for details.