Lots of JD equipment on site. HPX's, every kind of Gator you can think of. My new 550S4 has a poly roof and cab and this is my first and only one. This is my concern, you can not hear a thing operating this machine it is so loud. Looking over threads I see that there are all sort of tranny issues, clutch issues and shifting problems. Not even ten hours and have had shifting issues. I would like to know if anyone else has a cab on there machine. I think that between the engine and trans the noise multiplies throughout the cab and it is what it is kind of thing. What you guys think, are these machines loud in general with out a cab? It is so loud that you can not talk to the person next to you.