I have a F2560, 790 hrs, good shape. Have owned it 11 yrs. New UDT2 hydro fluid, filters. I have never had a problem until I started driving about 1 3/4 miles in high gear to mow my daughters lawn. After about a mile, it will shove some hydro fluid out the breather, not a lot, just enough to make a mess. No matter how hard you work it, or how hot, it won't do it any other time. Gear splash? Foaming? It also did it when I had regular non Kubota fluid in it, so I changed to the UDT2 to try and eliminate the problem. Anyone with an idea? Thanks