Hi, I'm new to OutdoorKing. I hope someone can help me. I recent procured this old Murray Ride-on and I'm having trouble getting it to roll. The engine is not going so I cannot drive it to move it, and I am trying to roll it but the back wheels want to go in opposite directions. The gearbox is in neutral and turning the motor over does not transmit power to the sprocket, putting it in gear does make the sprocket turn, so I'm happy that neutral is in fact Neutral. Is there a "lock" on the diff that has to be disengaged before it will roll? I know that sort of setup is on a lot of "modern" mowers. I have downloaded the parts manual but it doesn't show very much about the diff. Can anyone help??