It depends on how hard core the sod is. If it's regular old lawn grass and hasn't been growing nicely forever(as in it's been worked over when the house was built or something) than it should work pretty good. We used a drag behind the lawnmower and it took a LONG time dragging it to get the sod partially worked up. I was working with land that had been a hay field for 60 years or more though! That stuff was thick and SECURELY rooted down![:@] We then went over it with a landscaping rake(big aluminum one with thick tines) and it got a lot more of the sod up. That was as far as we went with grooming last year. This year were going to lay plastic down between the tiling and put about 3-4" of good clean dirt over it so that we can have a smooth and grass free track witih little to no maintenance for years to come.