Abstract: A slider assembly for loading and unloading a vehicle from a trailer includes a frame assembly movable between retracted and extended positions, a drive system including a drive motor and a linkage assembly operably coupling the drive motor with the frame assembly, wherein the drive system moves the frame assembly between the retracted and the extended positions thereof, and a wheel assembly movable between an extending position, wherein the wheel assembly extends away from the frame assembly and supports the frame above a ground surface and an angular ramp extending rearwardly of the trailer, and a retracted position, wherein the wheel assembly is retracted to a position proximate the frame assembly, and wherein the wheel assembly supports the frame assembly at a substantially constant height above a ground surface as the frame assembly is moved between the retracted and extended positions, and a controller adapted to control the drive system and move the frame assembly between the retracted and extended pos