I follow what DustyRusty is outlining, however I would change the order of action. If Kubota Customer Service turned the responsibility over to the local dealership, I would present the email to the principle owners at the dealership and ask for a resolution that suits you. Either a complete new transmission or new machine. If that is refused..... then I would proceed as Dustyrusty outlined, and I would express my dissatisfaction with his answer and let him know in detail who I am contacting, and emphasis the local TV Call For Action reporter.
I have actually asked a principle owner of a business if they had a line item in their budget for advertising. (of course they do) So advertising is important to you? Do you want a good return on your investment? I'm asking you to fix this and if it can't be done I'm probably going to waste a bunch of that budget when I explain this to TV 41 Call for Action!
Time isn't on his side. He is already into this 10 days, and the way that the mail is now days, he doesn't have the luxury of waiting. If they get this resolved before the letters arrive, then the letters are meaningless. In the meantime, he is without the machine, and the dealership is moving ahead with the repairs. Once the repairs are done, he has no recourse but to take the machine home and live with it. The best that will happen for him is that he never has a problem with it again in the future, but the tractor is covered for 6 years on the drivetrain. If it fails again, they are just going to keep repairing it. He has to take swift action now, and only when they feel the pressure of the problem, is it going to be resolved in his favor. I am an old guy, and I have learned a lot over the years. What I have learned is that it is best to act swiftly and firmly, because the giants of the world will roll over you if you don't. The State Attorney General can make one call, and the situation will be resolved.
A friend had his oil changed at the dealership, and the forgot to put oil into the engine. As a result, the engine failed. The told him that they were going to get a rebuilt engine from GM and replace it. It turned out that they installed a salvage yard engine into the truck. That engine was burning oil as soon as he got the truck back, and he complained to the dealership, who tried to blow him off. He filed a complaint to the States Attorney General at my suggestion, and they contacted the dealership. The dealership took the truck back, and installed a factory new engine in his truck, and then to sweeten the bitter experience, they gave him free oil changes for 3 years. Dealerships are licensed by the state, and they don't want to mess around with problems that they know that can bite them.