The left turning handle on my Toro Z is acting weird. It's very, erm, jerky when turning. Also, when I'm just in transport mode -- i.e. done mowing and driving forward, I have to put the left handle all the way to the front when the right handle is just pushed forward about halfway. Last year I ordered a new dampener and when it arrived I noticed it was much thinner than the original. I put it on anyway but it made no difference. I'm wondering if they changed the design of the dampeners or perhaps I got the wrong one? Any thoughts would be appreciated. Thank you.