MTD 600series, no neutral
I have an MTD lawn tractor 660-688 series (15 horse) that I purchased in 2003. It has been great, until now. It has sat all winter in the garage and I just tried to pull it out and do the lawn for the first time. I have no neutral gear. The motor will run, I can go forward and backward, but I have no neutral (the wheels feel locked up when in neutral position, you cannot manually push or pull the tractor, and you cannot dismount the seat in neutral position without the motor quitting now).
Help--ideas?
Thanks.