My Kubota 3830 started making a grinding noise from the rear tires. It sounds like cans getting run over. The sound isn't constant, but seems like it is made with the rotation of the tire. Each time it gets to a certain point of the rotation I can hear it. It is starting to get louder. It only has about 250 hours on it. Any help would be great. Thanks /forums/images/graemlins/confused.gif