In a quest to see if the noise coming from my front diff was excessive i ended up in the front diff and cleaning out some of the grease from around the casing which looked a bit dirty. I left most (but not all) of the grease on the actual diff itself, and (stupidly) added a drop of wd-40 (it was all i had to hand, don't ask).
So, in the absence of any diff oil (need to order some) i'm wondering if i can continue to drive the car, or should i wait until i've completely re-oiled the front diff?
As for the noise, i'm guessing it being fully greased lessens the noise? I'm not concerned about the noise itself, only if the noise might mean a problem waiting to happen.