 The DAF YA-328 used walking beams where the axle was no more than a pivot and the drive was supplied entirely by external longitudinal drive shafts, one on each side.As was usual for heavy vehicles of this period, the final drives and right-angle drive to the stub axles were combined through a worm gear box.This also had he advantage that it is easy to connect such boxes in series, using the rear end of the worm shaft as an output.