Swivel hubs leaking - how urgent?

[Cuppa]

I would have no hesitation using 4wd with a leak that minor. If you are really concerned and you want piece of mind then roll under the front of your car with your 1/2" breaker bar and undo the filler nut to the front diff and stick your finger in. If your fluid is up near the top then drive on mate. If it's a little low then add some diff oil if you have it. You will dump it all out anyway. You would be weary about using 4wd only if your front diff was empty and dry.

Yeah I hear what you're saying Darren, but when we are this far from anywhere we don't want to find ourselves well out in woop woop & out of range if the diff oil starts spraying the inside of the tyres. Mechanic also said we could do as you suggest, but then also suggested the risk of washing the grease out of the wheelbearings was probably around 50/50. We love our adventuring, but take a cautious approach to risk. If it were a 4wd jaunt in the woods near home I'd feel very differently about the risk. But thanks for your help.