I'd break those hubs down and look at the bearings, but that may be expensive for them to do. Mine seemed fine also, then the next day they were toast. Inspect that sub-frame in the front carefully for cracks in front of the engine. Also, take the driver side cover off the console and look at the shaft that connects to the forward-reverse lever. There is a metal flap attached that butts up to a magnetic switch when it's in neutral. Make sure that the bracket that the switch is attached to isn't bent or cracked. If it fails, it'll take a week to figure out why the tractor won't start. With as few hours as you have, there probably won't be any problems. I had over 300 hours on mine within a year of purchase.