Transmission system for work machine

A transmission system for a work machine, the transmission system comprising:

• a transmission having
• a clutch that can be switched between an engaged state and a disengaged state,
• a first shaft disposed on the input side of the clutch, and
• a second shaft disposed on an output side of the clutch;
• a first rotation sensor configured to detect a rotation speed of the first shaft;
• a first phase difference sensor configured to detect a rotation phase of the first shaft;
• a second rotation sensor configured to detect a rotation speed of the second shaft;
• a second phase difference sensor configured to detect a rotation phase of the second shaft;
• and
• a controller configured to acquire a load torque applied to the transmission,
• when the clutch is switched from the disengaged state to the engaged state, the controller being configured to derive a phase difference between the rotation phase of the first shaft detected by the first phase difference sensor and the rotation phase of the second shaft detected by the second phase difference sensor based on the time when the clutch has stopped slipping, and
• the controller being configured to acquire the load torque based on the derived phase difference.