Thanks gbirky. Look in the photo section under Skinman and there's a pic of the rear of the gearbox. It was 1:00 am our time last night (this morning) when I posted - forgot that photo. It's a 1:1 ration from PTO to driveshaft. I run it at 1000 RPM PTO. Had no instructions on how to use it - it came with my tractor. 540 RPM would barely get snow out of the chute - 1000 RPM throws a normal(?) snow about 15 ft. I hope to get pics of it installed soon, but it's going to be 60 deg. today - can't commit yet. Because of the gearbox, once it's on, nothing can be used on the 3 pt. lift. Hope to iron out that problem someday.