From what I've been able to find, there is no drain plug for the hydro tranny fluid; just one for the rear end gear oil. There should be a fill hole in the front of the tranny and a drain hole at the bottom. I'm trying to change my hydro fluid and I think I'll either have to remove the tranny and tip it upside down to empty the hydro fluid thru the fill tube or drill and tap a drain plug but that is not recommended.
Jeff St. Pierre, March 2009
