I think I know what is going on here. They changed the brakes on the newer models. The newer ones only use one disc brake that is mounted on the differential inside the frame and our older ones use a disc on each axle outside the frame. That is why they are locking the axle when the brake is applied. Go to the parts look up and you will see the difference. That stinks because I don't think there is anything you can do about that.
