I have a SWZ48-17KAI. It is an '06. When I release the left steering control, it releases slowly. The right side releases immediately when I let it go. I cannot see anything that would make it hang up. It makes it run in a circle. Perhaps this is related, but if I adjust the tracking and everything is right on and I put it away the next day when I start it up it is off again. The machine will slowly roll forward when I release the brake and thumb locks without the mower in gear. I appreciate your help, thanks!