One big factor in that is whether it's a diesel or not. The diesel has a lot more weight in the front. With my diesel and trailer of that weight I used my WDH about 40% of the time. I really didn't have any issues at all and pulled at 80 mph majority of the time. Now I'm pulling with my 7.3 gasser and about a 13k lb toy hauler bumper pull and won't leave home without it. LOL That thing feels like it will put you in the ditch. I have to load very tongue heavy (1600 lbs) then it pulls good. But just pull it, you will know pretty quick.