Abstract: A self-propelled device prevents any sliding on a track cable, no matter what the slope of the latter, by means of a dynamic clamping action which is self-gripping, self-stabilizing, self-controlled and proportional to the load. The device comprises a device for the automatic coupling and uncoupling of the engine, an end of travel automatic braking device and an automatic control device for lowering the speed in the case of a breakdown on a steep slope. The device can be used for the overhead hauling and transportation of various loads (lifting, handling, lumbering, civil engineering). It could also be used for transporting people (self-propelled ropeway or ski lift), as well as for the installation of small cables during the installation and maintenance of electric power lines.