I just inherited a Craftsman, 48", rider. Its a couple years old, starts and runs good, but will not go forward or reverse. The drive belt is okay. This model has a pedal to push for going in either direction, and has a "cruise control" for selecting the speed you want. A little history is that this 'wont go' started as the mower starting to slow down, then was slower on an incline, then slower, and this was over the last few uses. Now it is a push mower..... yuck. I say the drive belt 'looks okay'. Does the tranny have a fluid fill cap? Is it low on fluid? I have not done a thing other than to clean it up. Help.