I recently bought a new 4540 Montana tractor. I have never owned a new tractor before. This thing is hands down much better than the Farmall H I have been using all these years. I am very pleased with it performance however there is a noticeable gear whine in mostly the 3rd and 4th gear. At first I checked all the fluids and they were fine. I have continue to use the tractor for a total of 17 hrs. now with no change in the noise, but am concerned. Is it common for these transmissions to make some gear noise?