Combination of two drive and steering vehicle units

In an arrangement to simultaneously deliver the front sections of two identical vehicles, e.g. truck cabin with front running gear and motor, the two vehicles are linked back-to-back by a coupling unit (3). Each side of the coupling unit has push-fit extensions (11, 12) which are inserted into a matching conical socket (6). The extensions are then spread by a hand-wheel and spindle (8). Following assembly, the two units are delivered to a specialist vehicle builder.