I'm very new to tractors and I just purchased this bx2230. Runs great and just cut about 3 acres this evening....love the 60" cut!!!! I noticed something didn't notice before but very well may have already been there. I wqs heating a high pitch whine that was there constantly coming from what seemed like the transmission. It wqs while operating the hydrostatic, it's just always there, whether I'm in gear or just at low idle, it's a constant whine. Is this normal?