The wheels don't seem to be pulling on my '04 super z 60/ 27 kol. Just really noticed it yesterday. Especially up hills. It would do it on both sides. I would try to go up a hill and it was like the wheels were stutering? I would look at them and they were trying to turn. I would let off the controls a couple of times then it would grab hold and go like it should. I had the left wheel motor replaced about 100 hours ago. It was leaking oil. But this was happening to both sides. Might the motors be going bad? The fluid level is ok. I have not talked to the dealer yet.