I have 5 of these Tractors. Two 16 hp. hydro's, an 8 hp. gear drive, which is actually a lawn mower not a GT because it has small rear wheels, a 12 hp. gear drive and a 16 hp. gear drive that was my pulling tractor. The gear drives have the peerless transmission like the 580 cub has. One is a Dayton and the other 4 are known as Turf Trac which was sold by the Southern States Corp. All made by MTD and yes they are tough. I still use 1 every so often to cut grass and spray with. Both hydro's had a lever for forward and reverse that I switched over to a foot pedal. They have very large tires and wheels on the back. Not sure of the size right this minute. They had hydraulic lift for the deck and a true 3 point hitch for implements. 50" decks which to this day are solid as a rock. Made in the 70's. I have a manual for the 12 hp. All the models I have use a driveshaft to drive the mower decks. Sorry no pics. I also have 34 cubs and I use my 1650 and a 1620 lawnmower to do most of my yard work but the Turf Trac's can hang in there with the best of them.