I completely understand what you are saying Mark. However, let's see if this makes sense tho. You have two filters, and filters will get dirty and not do their jobs anymore. Further more, this is a fill plug on both plus a plug on the side. So if these are non-serviceable as you mentioned, why would they have filters to began with?
I have another question since we are talking about these transmissions. Got it home from the shop (the loaded it for me on to my trailer), and then started to cut grass. Then today as I was cutting grass for 1.5 hours, took a break and when I was walking back to the machine, I noticed that the two by-pass values rods where in the free wheeling position. So I consulted the book and closed them and proceeded to cut more grass.
Did I hurt the transmission? It seems to be running fine after I closed them?
Thanks
Dan