25170512
Gear Shift Cap
Mack

This cap protects the gear shift lever from dirt, moisture, and debris that can accelerate wear and impair smooth shifting. In heavy-duty trucks, the shift assembly is exposed to dust, road spray, and temperature extremes, making a robust cap essential to preserve the integrity of the selector mechanism. A well-sealed cap maintains interior cleanliness, reduces the chance of grit entering the linkage and detent system, and helps extend the life of the shift knob and boot. Installation is straightforward but should align with the lever shape and mounting method; ensure the cap seats evenly and forms a tight seal to prevent moisture intrusion. It also contributes to consistent tactile feedback during shifts by avoiding contaminant buildup in the mechanism. Replacing a worn cap can restore shift quality and reduce the risk of mis-shifts or spring wear. For a dependable fit, rely on parts from Source One Parts Center.