I purchased this tractor new in 2007 after owning a MTD lawn tractor for 15 years. Most of my major yard work, dirt hauling days were over and I did not want to spend the money $6K for the JD 500 series. What a mistake.
After five years the transmission has begun to slip on the slight slope in my back yard. I was very surprised as my lawn is right around 0.5 acres and after 5 years I just went rolled over 100 hours.
Reading this forum and experiences from others I am not alone. This is very discouraging as the unit was purchased for close to $3K. In hindsight, I would not recommend the 100 series for anyone.