Yep, my 3130 has the same creaky noise. I only hear it when moving about in the garage, likely because of the noise reflecting off the walls. I have the R4's, set at the widest stance. If you have the same, and look closely, you will notice the tire-rim assembly is bolted, with 4 bolts, to the center section which is in turn bolted to the axle. (The R1 setup is probably similar or the same). No matter how tight (red in the face and ready to pop) I get the 4 Bolts (> 160 lbs ft.) the creak persists. The tire-rim assembly may be a little larger in diameter than the mating diameter of the center section (radial assembly clearance) allowing for some minor radial slip when the tractor is in motion. If this is the case, IMO this is a minor issue since the weight of the tractor, especially with the hoe installed, will always close up the gap no matter how tight the 4 bolts are. A dab of grease applied to the contact areas when mounting the tire-rim assembly to the center section will lessen the noise as long as the grease persists. I'm not overly concerned. I can't find anything else loose under the tractor and I have worked it fairly hard without bits falling off. If you are sure the bolts are tightened to spec and she doesn't creak with the wheels off the ground, don't lose any sleep over it. If the dealer can't satisfy you then it's time to get to know your machine on a close, personal basis and then perhaps show the dealer what needs to be corrected. Consider this... if the tractor wasn't so smooth and quiet you would never have noticed. Best of luck. Or...disclaimer... I could be all wet /forums/images/graemlins/smile.gif
Martin