Whiteline Rear Spring Bushing and Greaseable Shackle/Pin KitThe Shackles and Fixed Pins are often overlooked when upgrading the suspension of a 4WD. Original shackles and fixed pins corrode and destroy the bushings and it is the leaf spring bushings that stabilise the movement of the rear axle. Worn or inferior bushes in this area will cause the solid rear axle to move and impart rear end passive steer to the vehicle leading to the vehicle 'wandering' all over the road and be unstable under heavy braking. This