My Lawn tractor is very old. It will start, but will not go into gear. The belt is old, but it seems to be still on. I do not know why it will not go into gear anymore. Does anyone know what I can do or look for so it will run. Also does anyone know if I need to check to see if it needs fluid added to the gear? I found a place that looks like it would be where you would add fluid if it needs some. I just do not know what to add if it does need it. I know nothing about this lawn tractor, it was my fathers when he was still living. It is still a good lawn tractor, then it just stopped going. It still starts. Help please. Thanks, Pam