The drive train on my 19 year old HRM has stopped engaging the wheels. I have a very small yard so this is a low mileage mower; 15 hours per year. I've pull the wheels and cleaned & lubricated the sliding cams to no avail. The belt seems good but as those of you that have this mower know you can't see much due to the blade clutch, etc... The cable seems to be pulling tight but once again, you can't see. I understand that there is a fork in the transmission that can fail. I'll tear it down this winter but I don't want to spend unnecessary money replacing the transmission if I should be looking at something else. Any thoughts would be appreciated. Thanks, Charlie