Hi. I've got an early 90's GT6000, 917.255980, 6 speed transaxle (well, 3 low and 3 high, plus reverse). The transaxle is leaking oil, appearing at the base at the center of the transaxle, and I assume it is the gasket where the two halves come together. The gasket is part number 121878X. Does anyone have experience changing out one of these? Is it worth the effort? Alternately, I figure I could rig up some kind of catch pan under there, and then just make sure I keep the transaxle filled. When we park the tractor after mowing, it seems to drop about an ounce onto the floor of my shed, leaking slowly over the next few hours. Thank you for your advice!!!