A door bracket is mounted to a vehicle sliding door. A primary track is mounted along a side and extends to a remote end. A roller bracket having rollers received by the primary track is movable between a first position proximate the opening and a second position at the remote end. A link is pivotally joined to the roller bracket by a first pivot and pivotally joined to the door bracket by a second pivot. The link is rotatable around the first pivot between a first orientation and a second orientation. The link comprises an extension arm extending from the link toward the primary track. A shift mechanism contacts the extension arm when the roller bracket is at an intermediate trip point so that the link shifts from its first orientation to its second orientation when the sliding door is being opened.