I had the item repaired. There were leaking O-rings on the brake shaft which is at the bottom in front of the spindle shaft. It was much more that I wanted to deal with. Thanks for the advice and for whoever posted the PDF for the transaxles, it was very helpful.
I took a look at the connections of the lines coming from the expansion tank and saw no signs of oil. It did appear most saturated on the outside face of the transaxle.
I don't have an answer to that. It didn't occur until the extreme cold we had in Texas last week. I had wondered if a gasket or o-ring shrunk due to the cold.
After extreme cold in Texas, my unit developed a hydraulic fluid leak on the rear left. It is in my garage and never experienced freezing but it did get cold. Any clues where this could be coming from. I have pics. The inside underneath is clean and it appears to start up top. Thanks for input.