Its not low on fluid. One of the problems I had when I was testing it yesterday was when I tried to climb a hill. It wouldn't go up it in low range, so I put it in high range, it wouldn't go up it, but then I almost floored the HST pedal, and it went up it. You could hear the engine drag down. At this point, I thought I still had a problem, but then I tried some other hills, in low range, and it worked fine. One hill was on the back slope of a ditch in front of my house, and is very steep, about as steep as you can go safely, and it went up it fine. Its without a doubt better, but I will just have to use it and see how it goes.
Another issue I had, which may be realated or not, I had a mouse build a nest near the intake of my air cleaner. It sucked it in a clogged up most of the air cleaner. I had this problem when I first noticed it wouldn't climb a hill. I cleaned it out and put in an older used air cleaner. I still had the old air filter in the machine when I tried it out yesterday. I have a new one to put in today, but its raining so it will have to wait to test again another day.