Welcome to the site. You might want to grease the chassis and u-joints to make sure all the steering and suspension components will take grease if they have grease nipples. If you want to stiffen up the suspension check out this site http://www.hellwigproducts.com/. It's an American company. I used the LP-15 on my 4x4 and it stiffened it right up. I can put a 1000 lbs in it and it still rides level.