Motorman, just getting back on here again, finally, and am wondering if it was ever decided if the tranny oil needed to be changed or/and if it was sealed. Last time I mowed with my GT52XLSi it almost stopped going up a hill, trying it later it acted like it wanted to and finally went up. Reverse worked fine. I'm thinking drive belt, tranny oil or (hopefully) adjustment. Anyone have any thoughts. If it ever stops raining here in PA I'll see if my 73 yr old bones will allow me to crawl under it.