the kelderman kits are designed to be driven at one height.... the adjustment is made for loading and unloading as well as for legalities in some jurisdictions... you are not meant to drive at multiple heights... so you get it aligned at the top height and have drive shaft angles for that height and you will not have an issue... you need to know about the product if you are going to buy it..... and if you ever ride in one you will change your mind... a lifted truck on military grade tires still rides like a cadillac....