Ok, not the diff. Dropped the engine skid and opened the fill plug, fluid started to seep out as I was opening it.
Also, can now confirm the color and consistency does not match diff fluid.
The fluid is yellow, and not very thick, consistency and color of coolant. But there is nothing leaking from any coolant location that is dripping to the shock area.
It seems concentrated on the shock tube and spring, shock hydraulic fluid? Is that yellow?
I wiped it all down and will go check in a couple hours to see what happens.