did my 50 hr service. Went a head and changed the hyd oil to the super HDT and was surprised to see that it will also work in the front axle. Synthetic oils have come a long ways when you can use a hyd oil in a gear case. I am a forklift and convayer mechanic and have used them for years in reducers. Pretty amazing stuff. Now that I have fresh oil and all of the "break in" bits out, I'm looking at many years of playing, um, I meen work. I am still amazed at how smooth the mower runs. That is alot of steel rotating.