just got our new to us '07 2588 this past week. I haven't done much with it other than driving it around the yard from one place to another. on our previous machine (01 2388) we would run in 2nd gear most of the time and at full stick and full throttle we'd get around 7mph out of it. the 2588 doesn't seem to move near as fast. when I drove it last I was focusing on other things and didn't think to look at my ground speed and I haven't taken it back out of the shed to see what speed it actually goes but it just seems much slower. the 2588 even has bigger tires on it so I think it should move slightly faster in the same gear. rpm goes up to exactly 2100 at full throttle. is the gearing a little different between the two machines? something else I should check?