My ltx1046 is 2 seasons old and running good. Just the other day, I noticed that i hear a whining coming from the hydrostatic trans. sounds like coming from the pulley/fan on top where the belt is attached. Never heard this loud before. The tractor is moving /running fine, and i checked everything underneath and looks good an straight. any suggestions, dont want to damage anything. The drive belt seems to have some excess play in it.. that normal?