I have a toro which works perfectly fine but it makes a sort of grinding noise the more i put the rear wheels up. There is no sound coming when I am in the middle of the wheel adjustment but when it goes to the two highest wheel levels it starts to do the noise. It is rear wheel drive and the self propel works good but I just want to know if the noise is normal or if maybe I need to grease it up or something before something wears off. Thanks
