I have about 180 hours on my 2010 kubota 1100. It has a noise that sounds like a engine connecting rod hammering only at high speed in high gear. It must be a speed related noise because if I slow down it gets better. If I put it in 4wd it goes away or in low or medium range it goes away. I have had to the dealer and they couldnt find anything and I have felt all off the shafts and dont feel any excessive play. Can someone please help?