Ensure your truck is Ready for the Road Ahead™ with the ideal amount of tension in the brake linkage, with the Gunite 1.5" Cam / 28-Spline / 5.5" Automatic Slack Adjuster. This replacement component checks the amount of slack between the brake shoe and the brake drum, and automatically adjusts the distance as needed to reduce overall wear. Engineered with a compensating mechanism that alters the position of the pushrod as the brakes wear down. FleetPride is your First Click in Heavy Duty®.