My 2002 TC40DA that I've had since 4/07 has SS and I love the short turning radius. Very useful in the woods on tight trails. How long has SS been around? Any long term reliability issues? Since I don't know how conscientiously the maintenance schedule was followed on my tractor, I'm debating trading on new tractor and question possible long term problems. I have found and replaced 2 zerks in front end that were clogged and I'm sure not greased in recent past before I got it.