Just got a new L3800HST, warm it up properly, and in any gear H, M, or L, in two wheel drive or 4 wheel drive, low RPMs and higher RPMs; when I go forward or backward (basically just driving the tractor), it makes a constant screeching/rubbing type of sound and it feels like it's laboring to move, like it's dragging. It feels like if you were driving a car with the parking brake on (and, I disengaged the parking brake on the tractor). Is this normal or something I have to get used to, or could there be a mechanical issue? thanks for any feedback. I'll call the dealer when then open.