So I had an over-full hydraulic reservoir, and water in the transmission oil when I began the spring. Last summer and fall, the last few times I used the tractor, I noticed leaks coming from the pto shaft, the seams of the transmission case, by the bell-housing, and from the bolt holes in the side of the case by the brake and clutch pedals-these are threaded holes that have never had bolts in them. This tractor had never had leaks for the whole of last summer that I had it. But it got worse each of those last few times I used it in the late summer/fall. I was told that it probably had the wrong fluids in it, so  I changed them out with 90 weight gear oil in the transmission, and John Deere Hygard in the hydraulics. The leakage seemed to stop shortly after I had started it up with the proper fluids in it. I really don't understand why milky looking oil was coming out the bolt holes. -Any oil. I used it for about 45 minutes to an hour, with almost no leakage. The trans oil seemed great. 
Today was the first day I used it for a lengthy period, about 4 hours straight. It ran well and worked well for quite awhile.
Though the leaks are nothing like they were, I was noticing oil coming out of the right side from the threaded bolt holes by the brake pedals, sometimes it actually squirted onto the foot rest, rather than just running down the side of the case. WHY?-It isn't a huge amount of oil, but got the footrest pretty wet. It seems there should be no oil in there, and certainly none coming out of there. Eventually, while I was climbing a very steep incline, I noticed a whining noise, so I backed down the slope and got it level, and it was better. Everything worked okay, but shortly afterward, I noticed that whenever the 3pt. was raised ( I was operating a brush hog ), there was some whining noise that got better when I lowered it. When I actually started watching, I noticed that the 3pt. was barely lifting, but when I lowered it to the stop, it would drop ( the whining sound would get better ), then raise slightly like usual. After I shut down the tractor, I noticed the hyd level was fine, though the 3 pt. was down, not lifted, when I checked it. I also noticed that the hyd case and the dipstick were pretty hot. -I could barely hold on to the dipstick/cap. I did notice that there was some fluid that had come out the hyd breather, which I had attributed to being on the steep slope. When I bought this thing a year ago, the fluids &amp; filters had been changed by the seller. Do you think that the hyd filter might be plugged or coming apart? Do you have any idea why I have trans oil coming out of these holes, and why the hyd whining sound? It kinda scares me about the 3 PT. not wanting to lift, along with the hydraulic whine. 
I also noticed that the left brake was not working well at all, and the tractor was pulling to the right in a stop. The left brake got a little better, after I used the brake awhile. 
Thanks for any help!