weight distribution hitch
"Springs and levers that transfer part of the imposed mass back onto the front wheels of the towing vehicle and, to a lesser extent, the trailer"
Fitting a weight distribution device of the correct type and size will mean that the tow vehicle becomes level.
A WDH will ensure the rear axle is not overloaded which may contribute to sway, and also makes sure the front axle is not under-loaded. A WDH may not suit all vehicles and trailers, so check with the manufacturer before you purchase and install.
When a trailer is placed on the ball of the tow hitch it places a lot of weight on the rear of the tow vehicle and changes the axis whereby there is less weight on the front of the tow vehicle raising the front wheels. This makes steering and braking less effective. Loss of traction can also be an issue especially for front wheel drive vehicles.
The heavy duty hitch receivers available can mount onto the vehicle in several positions enabling the load to be distributed over a wider area of the vehicle.