Yes, the 3430 was an HST model. I kept expecting the leak to get worse but it never did. I made sure the dealer knew about the problem just in case. He said pretty much what you did. Splitting the tractor for such a minor issue could cause more trouble than it fixes.
A coworker of mine bought a L3830 about the same time I did and he had the exact same problem. He still has the tractor and it still drips about the same as when he bought it.
Still, I agree with some other posters. It's a shame Kubota hasn't fixed the problem.
BTW, I just bought a L6060 a few weeks ago. I've got 48 hrs on it and so far (knock wood) no leak.
Keep me posted on your new L6060 and if it ever starts to leak.......sending good vibes your way.
Wonder if the hrs when leak starts is related to how much time is spent in 4wd not sure if the front drive shaft always turns or not? Over first 50hrs approx:
60% in 2wd
40% in 4wd
My hydraulic fluid is right at the top of the full line can't imagine there is an overflow within bell housing causing leak.......I wish?
I agree with most and if the leak doesn't get worse I'm not interested in having it split to fix any time soon. I'll wait until year 4 or 5 of warranty maybe I'll have other issues to fix....hope not.