I don't have any new ideas Vernon, but if you have discounted the power steering possibility, then you are left with no option but to accept it must be one of your seals gone again.
You will have no option but to strip it back till you see which is gone.
On a tangent to the subject, there have been a couple of threads lately discussing how quickly full synthetic oil [like Mobil 1] finds bad or dodgy seals and creates leaks. If it is the case that you are using full synthetic oil and you have another leaky seal, then maybe you should take this on board, and start using good mineral oil instead after you fix the leak?
It's just a suggestion, and will have no relevance if you are not using fully synthetic.
Joe
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