Most automakers recommend using a weight distribution hitch when towing over a
predetermined amount. For example, Ford and Ram say that one should be used when towing
over 5,000 lbs or a tongue weight that exceeds 500 lbs. This is because properly
distributing the load helps maximize the amount of control a driver has by putting
the load back on the front wheels. A trailer might shift too much weight to the rear,
which impairs handling and braking.