I bought a Kubota L-3800 with the HST on 08/01/2012. Now, on 08/07/2012 after a total of 7.2 hours the thing is in the shop for at least 4 days while they repair a broken piece that engages the the 4WD. The dealer was horrified that I had a problem and even offered to give me a set of chains for the rear of the rotary mower to compensate me for the inconvenience. Has anyone else had a similar problem??