We found that our pull rite jammed up and wouldn't hook up, when the front tires on the truck were about two feet lower than the back tires. I lowered the pin to just above the hitch. removed the pins holding the top section of the hitch, picked it up and slid it on the pin. Lowered the front legs on the 5er adjusted front and back with the truck until I could drop the hitch and insert pins. This process took about a very frustrating 45 min. A small up or down grade sloop doesn't seem to bother us just a sever one....