One method of controlling lateral flex is by installing a pan
hard rod kit. This is a system that utilizes a bar with one
end mounted to the axle housing and the other end mounted
to the chassis. This allows the rear end to move up and down
while limiting side-to-side movement. Keep in mind that whatever
controls the lateral movement in the rear suspension also
creates the roll center (the roll center is the point at which
the vehicle rotates axially during body roll).
Note: The roll center in the rear is separate from the roll center located at the front of the vehicle.
By simply moving
the roll center up and down, the spring rate can be manipulated
during cornering. The lower the roll center the softer the
spring rate appears, the higher the roll center the stiffer
the spring rate appears. The vast majority of Panard Rod Kits
currently available on the market can only be leveled. This
merely allows you to neutralize the Panard rod kit.