A slider pin release mechanism for a slider suspension system of a semi-trailer which includes a trailer body and a slider suspension which is movable longitudinally forwardly and rearwardly relative to the trailer body. Locking pins carried on the slider suspension are movable laterally into and out of locking engagement with the slider suspension and the trailer body. A longitudinally extending pivot rod connects to the locking pins. A ratchet gear is affixed to the forward end of the pivot rod. A handle is mounted on the pivot rod for rotation relative to the ratchet gear. A drive pawl is mounted on the handle and engages the ratchet gear to drive the ratchet gear upon rotation of the handle. A holding pawl is engageable with said ratchet gear. A drive pawl release rod is connected to the drive pawl.