I just purchased a 2017 x738 and its great. The dealership did a terrible job assembling everything but I fixed all of those issues. I do have one concern though and I was hoping someone could provide some guidance. When driving the tractor in a straight line, the front axle/transmission makes constant noise but as soon as I turn the wheel in either direction the noise goes away. If I ride in a circle there is absolutely no noise. I figure this has something to do with the way the machine pushes the front wheels but can't quite figure it out being a novice. I have checked the transmission fluid level and did add 1.5 quarts when I got the machine a few months back so I don't think that is the issue. Thanks for any assistance!