I have a 2001 with 68K. It has suddenly started to drip fluid near the differential, dead center on the floor. The fluid looks and feels muchlike power steering fluid, no color at all, but oily to the touch. The PS level was low, but I can't imagine that system is routed near the back of the car. What should I be looking for? I don't have a method to get the car in the air for a thorough exam. Thanks.