Very interesting--once again the facts get in the way of being "right!" Now totally confused, I called the Allison Tech Center today and they suggested "most" MH owners just change out fluid and filters every three years [assumes we never meet either the severe conditions or the mileage criteria in a 36 month period]. Otherwise, you are changing filters at 36 months [replaces about half yr fuild doing the change], then the following year, doing just the fuild, with or w/out filters. Seems to make more sense to just keep the filters and fluid on 3-year schedule. This forum sure keeps a fellow humble!
2003 40' MDTS
New Braunfels, Texas