A vehicle (10) particularly adapted for use as an automated guided vehicle uses standard plastic tote boxes as a body shell (13) and as a battery carrier (20). The vehicle includes a drive wheel assembly (14) and a bogey assembly (16) which pivot about center pivot points and are steered by a single motor-driven steering assembly (18) which provides dual fifth wheel steering. Commonly-driven ball screw lift assemblies (122) engage the underside of nestable load- carrying tote boxes (22) for pickup and delivery functions. The weight of the load carrier(s) is transferred through the vehicle frame (12) to load transfer assemblies (76) on the drive and bogey assemblies.