OK, the leak is coming from the differential drain. It was wet all around the allen screw drain plug. Color of the fluid isn't blue/bluish, it just looked that way because of the rubber mat I have on my shed floor. On my fingers it was basically clear. I didn't try to tighten the allen drain plug, but will try that in the morning. I want to confirm that it is still an active leak before I try and tighten the plug. Thank you.