keeps the rear axle from "wrapping" the leaf springs into a S shape... then when the wheels slip the axle snaps back... this loading and unloading can break u-joints,, pinions,, the leaf springs themselves, as well as cause violent wheelhop.
The antiwrap bar converts the rotational torque into down force as the axle now "plants" the tires... you will feel it the first time you step on the gas.. the rear squat will be replaced with a lifting feeling in the rear of the truck.
It works very well,, my buggy used to hop badly going uphills with the shackle flip on the rear.
now it plants the tires hard and the axle wrap is gone.... you won't be disappointed !!