The sagging rear of a 2003 Astro Van is no longer a problem. I currently have a decent weight on the shelves and if I had filled the tank before the springs were installed it would have popped on bumps. They worked great, now I can pack another 300 pounds in the van while cruising down the road on a full tank and the suspension feels as stiff as new. Better to change and spend money on new leaf springs. Installation wasn't difficult, I did it in 15 minutes.