Abstract: A portable winch system for use with truck bodies having a bed including raised opposed side walls. The system includes a winch comprising a drive motor, a transmission, a cable spool and a mounting bracket carried on a support bar for longitudinal movement. The support bar comprises first and second portions which are telescopically engaged to allow longitudinal adjustment thereof. The opposite ends of the support bar mount depending legs which are adapted to be removably engaged with the opposed side walls of the truck body to secure the winch system against rotational or longitudinal movement while allowing easy removal. With the support bar in position, the winch may be adjusted transversely of the truck bed.