The axle (1) comprises a differential (6), two transmission lines (8) coming from the differential to each driving a driving wheel (2) and steering control parts (4) for the driving wheels. Each transmission line comprises a driving shaft (10) connected to the differential and a driven shaft (12) connected to the corresponding driving wheel. A pivot pin (20) is transverse to each of the driving and driven shafts and there is a double transmission joint for the torque between the driving and driven shafts. This double joint comprises two basic joints (30A,30B), connected axially to one another, each having a basic joint center. Each shaft defines a fixed position along its axis (X-X,Y-Y) from the basic joint center of the corresponding joint. One of the basic joints freely slides along the double joint axis.
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