Every year I do an upgrade here or there for the truck or trailer. As the truck is starting to get long in the tooth I thought it time to give the rear springs a little support so I have ordered a set...
From my install instructions http://timbren.wpengine.netdna-cdn.com/wp-content/uploads/2017/08/DR3500CA.pdf ------- Clearance Instructions: Rear SES Kits for Pick-Ups and Vans should have a 1/2" to 1-1/2" gap between the rubber spring and contact point when empty. A partial load, or vehicle accessories will reduce or eliminate the gap. Front SES kits are usually in full contact. Medium and Heavy-Duty Trucks, Trailers and Motorhomes will be in constant contact, and have no gap.