Method for controlling a drive device for a working machine

A drive device for a working machine, comprising:

• an engine (11) configured for providing a driving force;
• at least one lockable longitudinal differential (21) configured for distributing the driving force of the engine (11) to at least two lockable transverse differentials (31, 32, 33), each transverse differential (31, 32, 33) being designed to distribute the driving force from an input element to two output elements, and the output elements being arranged to drive the working machine;
• a sensor configured for detecting a plurality of operating parameters, which include a rotational speed of the output elements of the transverse differentials (31, 32, 33);
• and
• a control unit configured to perform the following method:
• determining a differential speed (dn) between the rotation speed of the respective output elements of the at least two transverse differentials (31, 32, 33);
• determining that at least one differential speed (dn) reaches or exceeds a lock threshold value (x1), thereby determining that a longitudinal differential lock condition is met;
• and
• locking the longitudinal differential (21).