1. Though the terms “trailing arm” and “link” or “lower link” are often used interchangeably, we’d like to be more specific with our terminology. You’re looking at upper and lower links on the rear suspension of a Jeep JK Wrangler. Because the shocks do not mount to the links, they don’t have to support any chassis weight. These links are simply tubing with a suspension joint at each end. When we speak of “trailing arms,” we’re talking about lower suspension links to which shocks are mounted. Fair enough?