Hello all I am new at owning a Kubota. I shopped the JD and after lots of pondering I moved up a size and settled on a new Kubota. I get a vibration at full throttle and it can be felt on the deck near your feet. Tractor has .9 tenths... Seems like it is on the bucket. Loader is a LA 504 with light material 60" bucket. You can also hear the vibration in the air like a flutter. Should I be concerned or is it pretty normal. There is grease on the pivots my first thought. Any help would be appreciated -thx