I am having trouble on where to find info to adjust the travel control valve (linkage) on my case 444. I looked in the tech library but can't find it...I must be looking in the wrong spot. I am not certain it is adjusted right....It seems like I only have two speeds when I go forward or reverse as I move the speed lever with room so spare with no change of speed. It also slows down a little as the oil warms up. I changed the oil out...put some rottella 15w40 in it. Maybe this is normal???? These tractor are a little different than any other I have owned.