Originally Posted by TheDirtman

Set your parking brake and chock the tires, put a floor jack under the pinion and jack it up until it is touching it, remove the old arms 2 at a time either the uppers then the lower but DO NOT REMOVE ALL OF THEM A THE SAME TIME! Reinstall the two you removed then do the other two. Set the bottoms to the length in the write up, I think it is 23" center to center but not positive. Then adjust the top arms to get the caster you are happy with. Use the jack under the pinion to rotate the axle so you can hook the arms back up.